Relevant bibliographies by topics / Powder compacts

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Powder compacts'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Powder compacts"

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Kwon, Y. S., and K. T. Kim. "Densification Forming of Alumina Powder—Effects of Power Law Creep and Friction." Journal of Engineering Materials and Technology 118, no. 4 (October 1, 1996): 471–77. http://dx.doi.org/10.1115/1.2805944.

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High temperature forming processes of alumina powder compacts were analyzed by using constitutive equations which are capable of predicting densification and grain growth under diffusional creep and power law creep. Experimental results for alumina powder compacts were compared with finite element calculations by using the constitutive equations. The effects of friction between alumina powder compact and punches during sinter forging of alumina powder compacts were also investigated. Densification mechanism maps of alumina powder, which can be used for the optimization of various process variables, were constructed under hot pressing and general states of stresses.
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Kim, Youn Che, and Myung Jin Suk. "Expansion Behavior of Iron-Copper Compact from (FeCu) Pre-Alloyed Powder." Materials Science Forum 534-536 (January 2007): 517–20. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.517.

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Dilatometric curves of iron-copper compact made from elemental or pre-alloyed powder were compared in order to study its expansion mechanism. The compacts from a mixture of elemental iron and copper powders showed the maximum expansion at the copper powder content of 7.44mass% and at the sintering temperatures above the copper melting-point. In the case of the compacts from a mixture of iron pre-alloyed powder of (Fe- 3.44mass%Cu) and copper powder, the maximum expansion which is lower than the former case was obtained at the additive copper powder content of 4.00mass%. But the compact from a mixture of iron pre-alloyed powder of (Fe-7.18mass%Cu) and copper powder showed only shrinkages at any additive copper powder content. The penetration of liquid copper into the interstices between solid grains was observed in all sintered compacts. The iron-copper compacts containing the same content of copper powder showed a very different expansion behavior depending on the amount of copper content in the starting iron raw powder.
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Jia, Ming Tu, De Liang Zhang, and Brian Gabbitas. "Comparison of Blended Elemental (BE) and Mechanical Alloyed (MA) Powder Compact Forging into Ti-6Al-4V Rocker Arms." Key Engineering Materials 520 (August 2012): 82–88. http://dx.doi.org/10.4028/www.scientific.net/kem.520.82.

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Ti-6Al-4V rocker arms for internal combustion engines were produced by forging of compacts of blended powder consisting of elemental hydride-dehydride (HDH) titanium powder and Al60V40 (wt%) master alloy powder or mechanical alloyed (MA) powder synthesized by high energy mechanical milling of a mixture of HDH titanium and Al60V40 master alloy powders. The powder compacts were made by warm compaction, and their relative density was 90%. The mechanical properties and microstructures of as-forged parts made using blended powder were improved significantly with increasing holding time at forging temperature, and close to those of as-forged parts produced by powder compact forging of HDH Ti-6Al-4V pre-alloyed powder. However, the as-forged part produced by powder compact forging of MA powder was brittle, and fractured prematurely during tensile testing.
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Rajković, V., D. Božić, D. Vračarić, and E. Romhanji. "Properties of Dispersion-Hardened Copper Made by Internal Oxidation of Prealloyed Copper Powder Containing 2.5 wt. % Al." Materials Science Forum 494 (September 2005): 493–98. http://dx.doi.org/10.4028/www.scientific.net/msf.494.493.

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Prealloyed copper powder containing 2.5wt. %Al was processed in a planetary ball mill to evaluate matrix hardening due to formation of Al2O3 particles in situ by internal oxidation. After milling, the powders were heat treated in hydrogen in order to reduce copper oxide formed on particle surfaces during milling. The compacts were made by hot pressing. The examinations show that the compacts possess a good combination of high strength and high electrical conductivities. After 5h of milling the microhardness of the prealloyed compact was 3 to 4 times higher than that of the as-received electrolytic copper compacted under the same conditions, while the conductivity was 68% IACS. Also, it was found that the prealloyed compacts preserved much of the hardness after exposure to high temperature in inert atmospheres.
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Shen, Ye Qing, and Min Deng. "Capillary Absorption of Liquid by Powder Compact and its Application on Preparation of Repeatable Cement Compacts." Advanced Materials Research 163-167 (December 2010): 2916–19. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.2916.

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Preparation of repeatable cement compacts may contribute to quantitively research of processing, structure and properties of cement materials. Capillary absorption of liquid by powder compact was briefly reviewed. Deviation degree of absorption coefficient (Dac) was designed for evaluation on repeatable preparation of cement compacts. Dry cement was compacted in special moulds. A group of orthogonal experiments were designed to investigate repeatable preparation of the compacts. Results show the most important factor influencing on repeatable preparation is the cavity size of mould. The influence of force and specific surface area of cement is generally below 1.41%. According to optimum scheme for preparation, Dac is 0.00%. Repeatable preparation of cement compacts may provide a new method for quantitatively research of cement materials.
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CHIBA, AKIRA, and YASUHIRO MORIZONO. "FABRICATION OF TRICALCIUM PHOSPHATE COMPACTS BY UNDERWATER-SHOCK CONSOLIDATION." International Journal of Modern Physics B 22, no. 09n11 (April 30, 2008): 1783–88. http://dx.doi.org/10.1142/s0217979208047419.

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The present study is to fabricate dense tricalcium phosphate (TCP) compacts by our newly developed underwater-shock consolidation technique and to investigate the characteristics of the compacts. By adding Al 2 O 3 powder to β-TCP powder, the biocomposites were fabricated to improve the fracture toughness. Sound compacts of α- and β-TCP powders and β-TCP/ Al 2 O 3 biocomposite powder were fabricated without any cracks and tears. The relative densities of α- and β-TCP compacts were about 85% in as-compacted state and more 94% after annealing at 1373K for 7.2ks. Compressive strengths of α- and β-TCP compacts are 160 and 140MPa after annealing at 1373K for 7.2ks, respectively. Compressive strength and fracture toughness of β-TCP/ Al 2 O 3 biocomposites after annealed at 1373K for 7.2ks were 188MPa and 2.54MPa·m1/2, which are comparable to values of human bone, respectively.
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Raynova, Stella, De Liang Zhang, D. Polo, L. Gonthier, W. Egea, and V. N. Nadakuduru. "Tensile Properties and Fracture Behaviour of Induction Sintered Ti and Ti-6Al-4V (wt %) Powder Compacts." Advanced Materials Research 275 (July 2011): 196–99. http://dx.doi.org/10.4028/www.scientific.net/amr.275.196.

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Induction heating of powder compacts could be a very effective method for metal powder consolidation to get the final product or as an intermediate consolidation step to produce feedstock for metal powder forging or extrusion. Our study has proven that only a few minutes of induction heating, of Ti and Ti-6Al-4V (wt %) powder compacts, increases their density dramatically and causes a significant sintering effect, as evidenced by the formation of interparticle diffusion bonding and reflected by the tensile properties of the induction sintered powder compacts. This paper presents and discusses the results of a study on the tensile properties and fracture behaviour of the Ti and Ti-6Al-4V powder compacts sintered under a variety of induction heating conditions. Keywords: Titanium alloys, powder consolidation, powder compact sintering, induction heating.
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Miura, Hideshi, Hiroyuki Maeda, Makoto Uemura, Teruie Takemasu, and Masaaki Otsu. "Establishment of Laser Sintering Technique for Titanium Powder." Materials Science Forum 534-536 (January 2007): 465–68. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.465.

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This paper investigates the characteristic of single-layered and multi-layered compacts made by selective laser sintering using titanium powder. The surface texture and tensile strength were investigated by using single-layered compacts. There were few defects in surface of specimen laser sintered in vacuum, and the roughness was smoother than that of the specimen laser sintered in argon. Maximum tensile strength of single-layered compact laser sintered in vacuum was about 200MPa. The shrinkage and mechanical strength were investigated by using multi-layered compacts. There was a unique tendency in the shrinkage of multi-layered compacts, which the density was around 75% and the adhesive bonding was not observed between layers, resulted in 70MPa of maximum bending strength and 50MPa of maximum tensile strength.
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Liu, Yan Chun, An Ze Shui, Xue Tan Ren, and Ling Ke Zeng. "Sintering Shrinkage Anisotropy of Spherical Alumina Powder Compacts with Particle Orientation." Key Engineering Materials 334-335 (March 2007): 293–96. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.293.

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Spherical alumina powder and dispersant were mixed with distilled and deionized water, and ball milled to make alumina slurry. The slurry was dried in a high magnetic field to make a compact. Subsequently, the compact was cold-isostatic-pressed (CIP) to enhance the homogeneity in particle packing density. Anisotropy of shrinkage during sintering was examined for the alumina compacts in detail. Particle orientation existed in the spherical alumina powder compacts prepared in 10T, and made them shrink anisotropically during sintering. Sintering shrinkage was larger in the direction parallel to magnetic field direction (i.e., the c-axis direction of alumina crystal) than that in its perpendicular direction. The particle orientation structure in the compacts was confirmed with the immersion liquid method of polarized light microscope, and the grain alignment structure in the sintered bodies was also observed with X-ray diffraction, the c-plane was perpendicular to the magnetic field direction. On the other hand, isotropic sintering shrinkage occurred in the spherical alumina powder compacts prepared in 0T, which did not hold the particle orientation. The experimental results indicate that sintering shrinkage of spherical alumina powder compact depends on alumina crystal axis direction. Origin of the sintering shrinkage anisotropy for the spherical alumina powder compacts can be attributed to the particle orientation caused by high magnetic field.
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Zhu, Y. M., Xia Wan Wu, and Zhi Hong Li. "Sintering and Crystallization of Glass-Ceramics for Optical Fiber Ferrule." Key Engineering Materials 336-338 (April 2007): 1840–42. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.1840.

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The crystallization and sintering of the Li2O-Al2O3-SiO2 glass powder compacts were studied. Results showed the relative densities of the sintered compacts with lower crystallization temperatures were higher than those with higher crystallization temperatures. A small amount of residual glass in the crystallized compact was good for sintering and densification. Compared with the heat treatment time, the heat treatment temperature was an important factor for the crystallization and sintering of glass powder compacts. The crystallized compacts with a small amount of residual glass should be sintered at a relatively higher heating rate under the prerequisite of keeping sintered compacts from deformation.
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Dissertations / Theses on the topic "Powder compacts"

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Blackmore, Katherine Ann 1969. "Sintering of heterogeneous glass powder compacts." Thesis, The University of Arizona, 1995. http://hdl.handle.net/10150/291349.

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A modification of Scherer's Self-Consistent model and a new model, the Interlocking Cell model, have been developed to characterize the sintering behavior of mixtures of two glass powders. The theoretical sintering curves predicted by both these models are compared to each other and to experimental densification behaviors. Viscosities extrapolated from homogeneous sintering curves of sol-gel derived powders are transient and cannot be predicted based on composition alone. These transient viscosities have a significant effect on the sintering kinetics. The Self-Consistent and Interlocking Cell models assume very different microstructural changes during sintering. However, differences between the two models can just be distinguished using experimental densification curves of sol-gel cordierite based glass mixtures.
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Jonsén, Pär. "Fracture and stress in powder compacts." Doctoral thesis, Luleå tekniska universitet, Material- och solidmekanik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18300.

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In the field of powder metallurgy (PM), the production methods are constantly developed and improved to produce components with high precision and strength. Cold uniaxial pressing of powder into a green body is a common process in PM. During uniaxial die powder pressing, the volume enclosed between the die and punches is reduced and the powder consolidates until a final height is obtained or a prescribed compacting pressure is reached. Desired properties of the green body are high strength, uniform density, no defects and narrow dimension tolerances. In the development process of new components finite element (FE) modelling and simulations are useful tools, especially to predict density distributions. Today, it is desired to include prediction of fracture and residual stress of powder compacts. The aim of this work is to increase the knowledge of the pressing process and its effect on green body properties. This includes a better understanding of residual stress development in the green body during pressing and the tensile fracture processes of unsintered powder. Both experimental and numerical investigations have been performed to gain knowledge in these fields. An elasto-plastic Cap model has been developed for powder pressing. To improve modelling of strength in the green state a density dependent failure envelope has been used. The model is implemented as a user material subroutine in a nonlinear finite element program. An inverse method is used to adjust the model behaviour to a water atomised metal powder. The fracture process of powder material is studied experimentally with diametral compression test. The properties of conventional and high velocity compacted (HVC) powder is also studied. Methods to determine the tensile strength and fracture energy in metal powder are presented. The test is virtually reproduced with finite element simulations. The residual stress field of a powder compacted rectangular bar is predicted with 3D and 2D finite element models. The effects of kinematics, friction, compacting pressures and die tapers have also been investigated. Numerical results show that the thickness of the small compressive residual stress region close to the side surface varies between 50 ìm and 600 ìm along the surface. Compacting pressure, "upper punch hold down" and die taper geometry have all a significant influence on the residual stress state while die wall friction has only a small influence. The numerical results are in agreement with results from X-ray and neutron diffraction measurements. The diametral compression test is an established method for measurement of the tensile strength in a brittle material. During the test a load, P, is applied along a diameter inducing compressive stresses. Stresses are tensile perpendicular to the compressed diameter. These tensile stresses act until failure. During fracturing a large crack along the compressive loaded diameter in the centre of the disc is visible. The crack development is studied with both experimental and numerical investigations. The results show that both tensile strength and fracture energy is strongly density dependent. A cohesive material behaviour is observed in the experiments. The central crack is virtually introduced in a finite element model and controlled with a proposed energy based fracture model. A numerical investigation of the tensile fracture process in powder compacts is performed and results are in agreement with experimental results. This work has given a better understanding of residual stress development in powder compacts. Another outcome from this work is a refined experimental method to determine tensile strength and fracture energy of powder material. An energy based fracture model is proposed for numerical simulations of tensile fracture in powder material.

Godkänd; 2006; 20061205 (haneit)

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Robinson, Jeremy St John. "Extrusion of rapidly solidified powder compacts." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/46338.

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Shang, Chenglong. "Modelling powder compaction and breakage of compacts." Thesis, University of Leicester, 2012. http://hdl.handle.net/2381/10824.

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Experimental and numerical simulation studies were carried out to enhance the understanding of the compaction behaviour of powder materials and to study the breakage behaviour of tablets after compaction. In order to simulate powder compaction and post compaction behaviour an appropriate constitutive model is required. To calibrate the constitutive model (e.g. a Drucker-Prager Cap model) a series of experiments were carried out including closed die compaction, uniaxial and diametrical compression tests. A newly developed apparatus consisting of a die instrumented with radial stress sensors was used to determine constitutive parameters as well as friction properties between the powder and die wall. The calibration of constitutive models requires accurate stress-strain curves. During die compaction the deformation of the powder material is determined by considering the elastic deformation (or compliance) of the system. The effect of different compliance correction methods was evaluated with regards to the accuracy of models predicting the pressing forces. A method for accounting for non-homogeneous stress states in instrumented die compaction was also developed. A complete data extraction procedure was presented. The breakage behaviour of flat and curved faced tablets was investigated and the breakage patterns of tablets were examined by X-Ray computed tomography. An empirical equation that relates the material strength to the break force was proposed. The constitutive model was implemented into the finite element package Abaqus/Standard to simulate powder compaction and breakage. A range of failure criteria have been evaluated for predicting break force of flat and curved faced tablets under diametrical compression.
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Subrahmanyam, Gowri. "Sintering and its enhancement in ferrous powder compacts." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/32009.

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Sintering maps have been developed for pure iron compacts. The maps have been drawn as a function of various sintering parameters such as particle size, green density, time and temperature. Two sets of diagrams have been drawn to define the sintering kinetics, namely, the field map and the neck growth/shrinkage map. A new and simple method has been developed to construct the field maps, which define the dominant mechanisms of mass transport that contribute to neck growth under a given set of conditions of sintering. Shrinkage maps, which show how far the neck is growing or give % linear shrinkage for a given neck size and temperature, are generated by numerically integrating, the sum of the contributions to neck growth from the different mechanisms of transport. The model developed is based on ideal geometry and does not take into account complex phenomena such as grain growth, pore coalescence or pore growth. The sintering equations and diagrams that have been developed for pure iron compacts have been used effectively in the present study to predict and analyze the results of experiments involving various attempts to enhance sintering in such compacts. Small additions of a selected group of elements were made to iron compacts in an attempt to provide activation of solid state sintering similar to that which is obtained when tungsten powder compacts are doped with nickel. A few of the dopants used with iron compacts produced a small increase in shrinkage and densification for a given set of sintering conditions. Based on the present results and on the several studies of tungsten - nickel compacts which are reported in the literature, a new theory of dopant activated sintering has been proposed. Consistent with this model, it is suggested that certain criteria must be met by the dopant-base metal combination if activated sintering is to be observed. Sintering enhancement based on ferrite stabilization in two systems, iron - phosphorus and iron - silicon has been studied. This approach to solid state sintering enhancement proved to be highly effective and it is believed to have important practical applications in the P/M parts industry. The results of these experiments were consistent with predictions based on the sintering theory and maps appropriate to the conditions of sintering employed.
Applied Science, Faculty of
Materials Engineering, Department of
Graduate
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Çelik, Emrah Güden Mustafa Thesis advisor. "Preparation and characterization of sintered Ti-6A1-4V powder compacts/." [s.l.]: [s.n.], 2004. http://library.iyte.edu.tr/tezler/master/malzemebilimivemuh/T000472.doc.

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Candan, Ercan. "Wettability and pressurized infiltration of ceramic powder compacts by metallic melts." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286971.

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Gaboriault, Jr Edward M. "The Effects of Fill-Nonuniformities on the Densified States of Cylindrical Green P/M Compacts." Digital WPI, 2003. https://digitalcommons.wpi.edu/etd-theses/853.

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"We focus attention on single-punch compaction of metal powders in cylindrical dies. In one case, we consider solid cylindrical compacts, and take the die walls to be frictionless in order to isolate the effects of initial nonuniformities in powder fill on the final green density distribution of the compact. First, a model is introduced in which the die is filled with n distinct powders that occupy concentric annular regions within the die. The model requires that the balance of mass, the balance of momentum, and a realistic equation of state be satisfied in each region, and includes a plausible constitutive relation that relates the induced radial pressure in each powder region to the corresponding axial pressure and the relative movements of the interfaces that confine the region. For specified powder properties, the model predicts the movements of the interface between the powders, the final density in each region, the pressure maintained in each region, and the total compaction load required. In the special case of two powders (n=2), we predict how the radial movement of the single interface depends on the mismatch between the properties of the two powders. For large values of n, and for powder properties that change gradually from one powder to the next, the model approximates a single powder filled nonuniformly in the die. Finally, a model is developed for a single powder with continuously varying powder properties. Formally, the model may be obtained by taking the limit of the n-powder model as n becomes unbounded. Employing the continuous model, we determine how nonuniformities in initial fill density can be offset by nonuniformities in other powder properties to yield perfectly uniform green densities. In a second case, we consider axisymmetric, hollow, cylindrical compacts, and include the effects of friction at the die wall and the core rod. The ratio of the induced radial pressure to the applied axial pressure is assumed to be constant throughout the compaction, and Coulomb friction acts between the powder and the die wall as well as between the powder and the core rod. We derive a closed form solution for the axial and radial variation of the axial pressure, radial pressure, and shear stress throughout the compact. This solution is combined with a plausible equation of state to predict the final green density distribution and the variation of applied load throughout the compact."
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Jee, Caroline Siew Yoke. "Experimental investigation and molecular dynamic simulation of binder removal in powder compacts." Thesis, Queen Mary, University of London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409099.

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Steward, Nigel Ian. "Influence of particle size distribution on the sintering of ceramic powder compacts." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47674.

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Books on the topic "Powder compacts"

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Frances, Johnson. Compacts, powder, and paint: With values. Atglen, Pa: Schiffer Publishing, 1996.

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Edwards, Juliette. Miller's powder compacts: A collector's guide. London: Miller's, 2000.

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Collector's encyclopedia of compacts, carryalls & face powder boxes. Paducah, KY: Collector Books, 1994.

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Edwards, Juliette. Compacts: A manual for collectors of English powder compacts and vanity cases, 1920 to 1970. West End, Surrey: (J. Edwards), 1994.

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Zenger, David C. The common cracks in green P/M compacts: Handbook. Worcester, MA: Powder Metallurgy Research Center, WPI, 1997.

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Ali, M. El Sayed. Practical application of stepwise isothermal dilatometry for characterization of sinterability of powder compacts. Roskilde: Riso National Laboratory, 1988.

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Consiglio, Gioia Di. L' arte di incipriarsi. Roma: F.lli Palombi, 1999.

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Rozmus, Marcin. Wpływ warunków zagęszczania wirówkowego proszków na kształtowanie struktury gradientowej spieków diamentowych: Influence of high speed centrifugal compaction process on gradient structure of diamond compacts forming = Einfluss der Prozessbedingungen beim Zentrifugalverdichten von Pulvern auf Ausbildung einer Gradientenstruktur i Sinterdiamanten. Kraków: Instytut Zaawansowanych Technologii Wytwarzania, 2011.

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Grabinski, Wladyslaw, and Thomas Gneiting, eds. POWER/HVMOS Devices Compact Modeling. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-3046-7.

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Grabinski, Władysław, and Thomas Gneiting. Power/HVMOS devices compact modeling. Dordrecht: Springer, 2010.

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Book chapters on the topic "Powder compacts"

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Evans, James W., and Lutgard C. De Jonghe. "Sintering of Powder Compacts." In The Production and Processing of Inorganic Materials, 402–39. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48163-0_13.

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Ueta, Márcia Christina Carneiro, Carlos Augusto Fracote, Vinicius André Rodrigues Henriques, Mario Lima de Alencastro Graça, and Carlos Alberto Alves Cairo. "Densification Study of Titanium Powder Compacts." In Advanced Powder Technology IV, 211–16. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-984-9.211.

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Abe, Osami, Syuzo Kanzaki, Masayoshi Ohashi, and Hideyo Tabata. "Characterization of CIP Formed Powder Compacts." In Sintering ’87, 237–42. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-1373-8_40.

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Prado, Jose Manuel. "Plastic Behaviour of Green Powder Metallurgical Compacts." In Progress in Powder Metallurgy, 305–8. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.305.

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Prado, Jose Manuel. "The Elastic Behaviour of Metal Powder Compacts." In Progress in Powder Metallurgy, 325–28. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.325.

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Thomas, Graham H., and Susan L. Crawford. "Ultrasonic Evaluation of Low Density Powder Compacts." In Review of Progress in Quantitative Nondestructive Evaluation, 1207–14. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3742-7_10.

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Stangle, Gregory C. "Example: Binder removal from shaped powder compacts." In Modelling of Materials Processing, 725–58. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5813-2_21.

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Pieczonka, Tadeusz, and Jan Kazior. "Sinter-Bonding of Iron Based Compacts Containing P and Cu." In Progress in Powder Metallurgy, 633–36. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.633.

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Tanaka, T., T. Ohashi, Kazunori Oshiro, Hirotaka Fujimori, H. Kurisu, M. Matsuura, and Setsuo Yamamoto. "Fabrication of Deep-Sub-Millimeter-Thick Compacts Using Spark Plasma Sintering." In Progress in Powder Metallurgy, 521–24. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.521.

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Zubizarreta, C., I. Arribas, S. Giménez, and I. Iturriza. "Softening-Hardening Mechanism in the Direct Hot-Extrusion of Aluminium Compacts." In Progress in Powder Metallurgy, 837–40. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-419-7.837.

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Conference papers on the topic "Powder compacts"

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Hogg, S. C., H. V. Atkinson, and P. Kapranos. "Thixoforming of Stellite Powder Compacts." In 10TH ESAFORM CONFERENCE ON MATERIAL FORMING. AIP, 2007. http://dx.doi.org/10.1063/1.2729676.

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Aktas, Levent, Youssef K. Hamidi, and M. Cengiz Altan. "Wetting of Compacted Nanoclay Powder by Epoxy Resin." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80381.

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Spreading behavior and advancing contact angle of a low viscosity epoxy resin on three commercially available nanoclays — Cloisite® Na+, Cloisite® 15A and Cloisite® 25A — at 52°C is investigated. In addition, effect of temperature on spreading dynamics of epoxy on Cloisite® Na+ is analyzed at 33, 52 and 77°C. For wetting experiments, nanoclay powder is compressed into 12.7mm diameter disk shaped compacts under 20MPa pressure. The surface topologies of the compacts are analyzed by scanning electron microscopy (SEM), where as energy dispersive x-ray analysis (EDXA) is utilized to quantify the chemical composition of the surface. An epoxy drop is placed on each of the compacts and spreading is monitored via a CCD camera equipped with a high magnification lens. Temporal evolution of the advancing contact angle as well as drop penetration into the nanoclay compact is determined using the drop profiles extracted from the sessile drop images. Spreading of epoxy on Cloisite® Na+ is observed to be 12-fold faster at 77°C compared to 33°C. Analogous to its spreading speed, rate of penetration of resin into the nanoclay compact increased 20-fold in the same temperature range. Behavior of different nanoclay types are assessed by repeating the wetting experiments on Cloisite® 15A and Cloisite® 25A compacts. Unlike Cloisite® Na+, which did not have a finite static contact angle, Cloisite® 15A and Cloisite® 25A yielded static contact angles of 59.2°and 40.1°, respectively. These differences are attributed to different surface energies as a result of different chemical compositions of the surfaces and dissimilar surface topologies.
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3

Benzerrouk, Souheil. "Electrothermal Defect Detection in Powder Metallurgy Compacts." In QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2006. http://dx.doi.org/10.1063/1.2184661.

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4

Salem, H. G., and M. Shamma. "Effect of the Compaction Parameters and Canning Material of Nanostructured Al-Powder Consolidated via Intense Plastic Straining Process." In ASME 2008 2nd Multifunctional Nanocomposites and Nanomaterials International Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/mn2008-47063.

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Research groups around the world have reached common and contradicting conclusions regarding the behavior and properties of nanostructured materials. The aim of this research is to affirm the common findings by previous research, and support one of the currently proposed concepts of mechanical behavior based on processing and characterization of consolidated nanocrystalline micropowders of high strength/precipitation hardenable aluminum alloy using combined PM/intense plastic straining via Equal Channel angular Extrusion (ECAE). This research work investigated the effect of (a) Cold and hot consolidation of nanocrystalline Al-2124 micropowders into compacts with 4.0 h/d ratio and (b) Canning material used for encapsulating the compact rods for subsequent extrusion within the ECAE channels, and (c) the effect of ECAE number of passes and routes on the green compact properties. The effect of the processing parameters (compaction condition, extrusion temperature, strain rate) on the sample density, grain, subgrain and subcell sizes, and hardness was studied. Pure wrought and cast Cu, and casts Al-cans as well as Al-2024 wrought cans were used for canning of the consolidated powders. Green and hot compact rods were produced from 40μm average particle size Al-2124 powders with 53nm internal structure. Highest density consolidated rods were produced for the double sided cold compaction at 6σ (450MPa) over duration of 30min, while single sided compaction at similar pressure over 60min duration time of compaction and at temperature of 480°C produced the most dense and highest hardness hot compacts. Pure wrought Cu and cast Al are the most suitable canning material for room temperature ECAE of the Al-2124 green compacts. Non-isothermal heating during extrusion hindered the uniform warm deformation of the green and hot compacts canned in wrought Al-2024. Loose powder particles of the green compacts results in particle rotation while passing though the 90° angle intersecting channels of ECAE, and hence prevents full consolidation and densification of the produced product.
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Otsuki, Etsuo, Kenichiro Ishii, and Shinya Nakano. "SMD inductors based on soft-magnetic powder compacts." In 2010 IEEE Applied Power Electronics Conference and Exposition - APEC 2010. IEEE, 2010. http://dx.doi.org/10.1109/apec.2010.5433692.

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IVESON, S. M., and N. W. PAGE. "DYNAMIC MECHANICAL PROPERTIES OF LIQUID-BOUND POWDER COMPACTS." In Proceedings of the Third Australasian Congress on Applied Mechanics. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777973_0062.

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7

Pribytkov, G. A., V. V. Korzhova, and E. N. Korosteleva. "Structural transformations in air heated Al-Cr powder compacts." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5132156.

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8

Bian, H. "Laser-Based Ultrasonic Tomographic Imaging of Powder Metal Compacts." In QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2004. http://dx.doi.org/10.1063/1.1711687.

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9

Kida, Junichi, Shigeru Tanaka, Kazuyuki Hokamoto, and Shigeru Itoh. "The Research on Molding Super-Hard Material Powder Using Shock Compaction." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26259.

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Shock compaction techniques have been developed in order to create new advanced materials with improved and unique properties. The problem in industrializing the technique is the formation of cracks due to the propagation of strong shock wave inside the material to be consolidated and a size limitation for recovered compact. Therefore, we developed a modified apparatus to employ cylindrical configuration. The tungsten carbide is used for a lot of tools by the peculiar mechanical properties. A lot of time is needed for the manufacturing though the solid of the super-hard alloy like the tungsten carbide is manufactured by sintering usually. So we tried shock compaction to make bulk materials of hard-to-consolidate powders using cylindrical configuration. Using the cylindrical configuration, shock compaction experiment was carried out for consolidation of WC-15wt%Co powders. Look of compacted exactly were observed for a sample recovered. High compaction hardness was also measured for the sample. Numerical simulation was carried out using LS-DYNA3D and compared with the experimental result for the WC-15wt%Co compacts.
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Fliflet, A. W., R. W. Bruce, S. H. Gold, C. Stephenson, A. K. Kinkead, and M. A. Imam. "S-band microwave processing system for melting titanium powder compacts." In 2010 IEEE 37th International Conference on Plasma Sciences (ICOPS). IEEE, 2010. http://dx.doi.org/10.1109/plasma.2010.5533956.

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Reports on the topic "Powder compacts"

1

Lange, Fred F. Mechanics of Powder Plastic Powder Compacts. Fort Belvoir, VA: Defense Technical Information Center, January 2001. http://dx.doi.org/10.21236/ada392070.

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2

Chu, May-Ying. Sintering stress and microstructure in ceramic powder compacts. Office of Scientific and Technical Information (OSTI), August 1990. http://dx.doi.org/10.2172/6388375.

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3

Yokota, Shari Hanayo. Oxidation behavior in reaction-bonded aluminum-silicon alloy/alumina powder compacts. Office of Scientific and Technical Information (OSTI), December 1992. http://dx.doi.org/10.2172/10141012.

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4

Yokota, S. H. Oxidation behavior in reaction-bonded aluminum-silicon alloy/alumina powder compacts. Office of Scientific and Technical Information (OSTI), December 1992. http://dx.doi.org/10.2172/6625941.

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5

Gundersen, Marin A., James Dickens, and William Nunnally. Compact, Portable Pulsed-Power. Fort Belvoir, VA: Defense Technical Information Center, August 2006. http://dx.doi.org/10.21236/ada458533.

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6

Fry, D. N., D. E. Holcomb, J. K. Munro, L. C. Oakes, and M. J. Matson. Compact portable electric power sources. Office of Scientific and Technical Information (OSTI), February 1997. http://dx.doi.org/10.2172/663584.

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Pickrell, Gregory. Compact Power Switch Replacement Candidate. Office of Scientific and Technical Information (OSTI), January 2021. http://dx.doi.org/10.2172/1763598.

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8

Kristiansen, M., J. C. Dickens, and S. I. Shkuratov. Compact Pulsed Power and High Power Microwave Devices. Fort Belvoir, VA: Defense Technical Information Center, September 2003. http://dx.doi.org/10.21236/ada418099.

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9

Gauthier, Daniel J. Compact, High-Power, Two-Photon Lasers. Fort Belvoir, VA: Defense Technical Information Center, September 1995. http://dx.doi.org/10.21236/ada300483.

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10

Gauthier, Daniel J. Compact, High-Power Two-Photon Lasers. Fort Belvoir, VA: Defense Technical Information Center, September 1995. http://dx.doi.org/10.21236/ada300412.

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