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Atta-Fynn, Raymond. "Theory of localized electron states and novel structural modeling of amorphous silicon /". View abstract, 2005. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3203330.
Pełny tekst źródłaPunsalan, David Troy. "A sorption and dilation investigation of amorphous glassy polymers and physical aging". Access restricted to users with UT Austin EID, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3035168.
Pełny tekst źródłaSaito, Ichitaro. "Amorphous selenium photoelectric devices". Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610017.
Pełny tekst źródłaJiang, Yucheng, i 姜昱丞. "Magnetoresistance, photoconductivity and strain effect in the system of magnetically doped amorphous carbon". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/208021.
Pełny tekst źródłaGabriel, Margaret A. "Electronic defects in amorphous silicon dioxide /". Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/8553.
Pełny tekst źródłaGoldstein, Alexandra Susan. "Computer simulations of amorphous copper-zirconium /". Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/8629.
Pełny tekst źródłaChieng, Heng Liang Norman, i n/a. "Amorphous drug preparation using ball milling". University of Otago. School of Pharmacy, 2008. http://adt.otago.ac.nz./public/adt-NZDU20081209.162001.
Pełny tekst źródłaChen, En-Tsung. "On the pressure formation of metallic glasses". Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/17978.
Pełny tekst źródłaBrüning, Ralf. "Reversible structural relaxation in iron based metallic glasses". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65539.
Pełny tekst źródłaLau, King Cheung. "Crystallization of amorphous alloy and the associated changes of properties". access abstract and table of contents access full-text, 2005. http://libweb.cityu.edu.hk/cgi-bin/ezdb/dissert.pl?msc-ap-b21174453a.pdf.
Pełny tekst źródłaAt head of title: City University of Hong Kong, Department of Physics and Materials Science, Master of Science in materials engineering & nanotechnology dissertation. Title from title screen (viewed on Sept. 1, 2006) Includes bibliographical references.
Heinz, Andrea, i n/a. "Novel approaches for physicochemical characterisation and quantification of amorphous pharmaceutical compounds". University of Otago. School of Pharmacy, 2008. http://adt.otago.ac.nz./public/adt-NZDU20080924.133134.
Pełny tekst źródłaLu, Meijun. "Silicon heterojunction solar cell and crystallization of amorphous silicon". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 295 p, 2009. http://proquest.umi.com/pqdweb?did=1654494651&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Pełny tekst źródłaTse, Shing Chi. "Charge transport and injection in amorphous organic electronic materials". HKBU Institutional Repository, 2007. http://repository.hkbu.edu.hk/etd_ra/821.
Pełny tekst źródłaКовтуненко, В. С. "Застосування квадратичного розподілу міжатомних відстаней координаційних сфер аморфних плівок". Thesis, Видавництво СумДУ, 2012. http://essuir.sumdu.edu.ua/handle/123456789/27632.
Pełny tekst źródłaKatakam, Shravana K. "Laser Surface Treatment of Amorphous Metals". Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc500194/.
Pełny tekst źródłaWilks, Broderick. "Free volume and free volume distribution impact on transport properties in amorphous glassy polymers". Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/9377.
Pełny tekst źródłaKanakala, Raghunath. "Spark plasma sintering of a structurally amorphous metal (SAM7) with addition of Y₂O₃ with nanoparticles". abstract and full text PDF (UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1456485.
Pełny tekst źródłaSocratous, Josephine. "Investigating defect states and charge transport in amorphous metal oxides for thin-film transistor applications". Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709317.
Pełny tekst źródłaFong, Hon Hang. "Transport and luminance of organic electronic materials". HKBU Institutional Repository, 2004. http://repository.hkbu.edu.hk/etd_ra/612.
Pełny tekst źródłaDonev, Jason Matthew Kaiser. "Non-contact atomic force microscopy studies of amorphous solid water deposited on Au(111) /". Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/9779.
Pełny tekst źródłaLi, Huaming. "Theory of phase transitions in disordered crystal solids". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29707.
Pełny tekst źródłaCommittee Chair: Li Mo; Committee Member: Chou Meiyin; Committee Member: First Phillip; Committee Member: Nguyen Toan; Committee Member: Zangwill Andrew. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Gao, Chao. "Spectral momentum densities of crystalline graphite and ion sputtered amorphous carbon films from (e,2e) spectrology". Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/53693.
Pełny tekst źródłaAnooshehpour, Farid. "Optical emission spectroscopy as a process-monitoring tool in PECVD of amorphous carbon coatings". Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/27142.
Pełny tekst źródłaThe production of amorphous carbon coatings or as commonly known as diamond like carbon (DLC) coatings, using the plasma enhanced chemical vapor deposition (PECVD) method is studied through optical emission spectroscopy (OES) as a plasma diagnostic technique and the partial least square regression (PLSR) statistical method. The objective is to establish a model to predict DLC properties independent of reactor-related parameters, in order to be used in any other similar deposition process. Therefore the model correlates the deposited coating properties to plasma parameters derived from OES. The OES derived data carries a variety of information about plasma characteristics. The relative spectral line intensities of CH and atomic H to specific Ar lines were employed as a probe of their concentrations according to actinometry method. The full width at half maximum of atomic H was also employed. This method can be used as a probe of gas temperature via Doppler broadening effect. The DLC coatings were characterized using profilometry for thickness and stress measurements and Auger electron spectroscopy (AES) for structural analysis. There were two series of PLSR analysis carried out: The first analysis studies the correlation between process parameters and plasma characteristics, as derived by OES, for a better understanding of the plasma deposition process. The second analysis shows how the OES can be used for prediction of coating properties and for process monitoring. According to the results, the OES data (especially the parameters that are related to the concentration of atomic hydrogen and CH species) are able to represent some parts of process parameters (plasma power, mode and pressure) in a statistical model that is designed for predicting DLC coating properties. In other words, this means that this plasma diagnostic technique can be employed for in-situ monitoring of growing DLC coating properties, instead of using process parameters, which are related to the deposition reactor and may vary from one system to another. The perspective of using the OES data and the PLSR analysis in designing and monitoring a structurally gradient DLC coating is also discussed.
Van, Order Jon P. "Molecular modeling of intermediate order in polymer glasses". Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/10134.
Pełny tekst źródłaKazi, Haseeb. "Plasma Interactions on Organosilicate Glass Dielectric Films and Emerging Amorphous Materials- Approach to Pore Sealing and Chemical Modifications". Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc801876/.
Pełny tekst źródłaMarshall, Gillian E. "Thermal annealing and superconductivity in Zr based metallic glasses". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65501.
Pełny tekst źródłaShrestha, Kiran (Engineer). "Electrical Conduction Mechanisms in the Disordered Material System P-type Hydrogenated Amorphous Silicon". Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc700106/.
Pełny tekst źródłaDuque, Jose Gerivaldo dos Santos. "Magnetoimpedância gigante linear e não-linear em ligas amorfas". [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278277.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
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Doutorado
Física da Matéria Condensada
Doutor em Ciências
Maldei, Michael. "A study of the suitability of amorphous, hydrogenated carbon (a-C:H) for photovoltaic devices". Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1175022667.
Pełny tekst źródłaManoharan, Krishna. "Design and Analysis of High-Q, Amorphous Microring Resonator Sensors for Gaseous and Biological Species Detection". Ohio : Ohio University, 2009. http://www.ohiolink.edu/etd/view.cgi?ohiou1237489189.
Pełny tekst źródłaMalaguti, Vilmar dos Santos. "Reuso de água e resíduos gerados pela lavagem de caminhões betoneiras: análise do efeito na resistência à compressão de concreto usinado". Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/1886.
Pełny tekst źródłaThe objective of this study is to analyze the strength of concrete compression and its possible effects on water reuse and waste washes of concrete mixer trucks. The literature review on the proposed subject was studied and discussed in countries like Greece, Taiwan, Germany, Italy, Singapore and others, which served as support and reinforcement for this work. The method for analyzing the compressive strength was compared between the control sample (standard stroke 30 MPa) and samples with different compositions. The result of each sample was different depending on their composition, however, it can be stated economic gain on the order of 20,21 R$/m3, in addition to the compressive strength is greater than 90% of the control sample. The samples were analyzed by DRX, MEV and EDS showed that there was no synthesis of new mineral, only small amounts (lower than the detection limits of the DRX method) dissolved alumino-silicates and quartz which have been synthesized into new mineral crystalline, which can be assigned as amorphous substances in sol-gel state. With this result it was observed that the reuse of the concrete mixer trucks washing water does not interfere with the compressive strength of new concrete, as well as the washing residue which presented no different element of the compound in cement, does not interfere with the compressive strength new concrete, provided that control of the water present.
Dehlinger, Nicolas. "Étude des performances d'une machine à flux transverse à noyaux ferromagnétiques amorphes". Thesis, Université Laval, 2007. http://www.theses.ulaval.ca/2007/24934/24934.pdf.
Pełny tekst źródłaTransverse flux machines (TFM) are known for their excellent torque-to-mass and torque-to-volume ratio when compared to conventional machines. Despite this advantage, they have some serious shortcomings like complex construction and high cost, explaining why TFM that can be found in the literature are usually only prototypes. Moreover, the TFM shows a dependence of its force density upon its pole pitch and airgap thickness, which leads to high electrical frequencies and thus to high core losses. For all these reasons, this type of machine could be considered in high-torque low-speed applications such as wind turbines or electrical traction drives. The work presented in this document contributes to the development of a new TFM configuration: the claw-pole TFM with hybrid stator (CPTFMHS). Such a stator built from a combination of Fe-Si laminations and powdered iron (SMC), enables reducing iron losses significantly and improving the ease of manufacturing of the machine. The concept of the hybrid stator can be further developed by using new magnetic materials with lower specific losses. The substitution of Fe-Si laminations by amorphous cores in the stator of the CPTFMHS is studied in this work and presented here. Experimental measurements are conducted on a one-pole pair CPTFMHS machine with an amorphous core: the results show a reduction of the total iron losses, thus proving benefits of amorphous cores used in the machine. Finite element simulations coupled with experimental measurements lead to the following conclusion: the efficiency of a CPTFMHS machine can be maintained to a high level at frequencies above 400 Hz, thanks to the use of amorphous cores, which may not be possible with Fe-Si laminations.
Mpingi, Wilfred Mbiombi. "Structural, electrical and electronic properties of diamond like carbon (DLC) and carbon-based materials". Thesis, 2014.
Znajdź pełny tekst źródłaSafarik, Douglas Joseph. "Crystallization of amorphous solid films". 2003. http://wwwlib.umi.com/cr/utexas/fullcit?p3116175.
Pełny tekst źródłaMcClure, Sean Michael. "Transport mechanisms in nanoscale amorphous solid water films". Thesis, 2006. http://hdl.handle.net/2152/2575.
Pełny tekst źródła"preparation of bulk amorphous Pd₄₀Ni₄₀P₂₀ alloys by compaction". 2001. http://library.cuhk.edu.hk/record=b5890792.
Pełny tekst źródłaThesis (M.Phil.)--Chinese University of Hong Kong, 2001.
Includes bibliographical references (leaves 51).
Text in English; abstracts in English and Chinese.
Ma Lai Ching = Li yong re ya fa zhi bei kuai ti fei jing tai Pd₄₀Ni₄₀P₂₀ he jin / Ma Lizhen.
Acknowledgements --- p.i
Abstract --- p.ii
Chapter Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Introduction to Metallic Glass --- p.1
Chapter 1.2 --- Applications of Metallic Glass --- p.2
Chapter 1.3 --- Solidification Process --- p.3
Chapter 1.4 --- Some Production Methods of Bulk Glassy Alloys --- p.10
Chapter 1.5 --- Another Production Methods: Powder Consolidation --- p.11
Chapter 1.6 --- Flaws of the as-Compacted Materials --- p.16
Chapter 1.7 --- A Solution --- p.17
References --- p.20
Figures --- p.22
Chapter Chapter 2 --- Experimental --- p.31
Chapter 2.1 --- Production of Pre-Compacted Bulk Metallic Glass --- p.31
Chapter 2.2 --- Handling of Bulk Glass Before Compaction --- p.34
Chapter 2.3 --- Compaction Process --- p.35
Chapter 2.1 --- Sample Analysis --- p.37
Figures --- p.40
Chapter Chapter 3 --- Mechanism of fusion of bulk metallic glasses --- p.45
Abstract --- p.45
References --- p.51
Table --- p.52
Figures --- p.53
Tiwari, Rashmi Satyanarayan. "A new determination of molecular mobility in amorphous materials". 2008. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051222.
Pełny tekst źródła"Crystallization kinetics of amorphous nanostructured materials =: 非晶納米結構材料的結晶動力學". 1998. http://library.cuhk.edu.hk/record=b5889731.
Pełny tekst źródłaThesis (M.Phil.)--Chinese University of Hong Kong, 1998.
Includes bibliographical references.
Text in English; abstract also in Chinese.
Ngai Hau Wai.
Acknowledgements --- p.ii
Abstract --- p.iii
Chapter Chapter 1: --- Introduction --- p.1
Chapter 1.1 --- History of nanomaterials --- p.1
Chapter 1.2 --- Application and properties of nanomaterials --- p.2
Chapter 1.3 --- Thermodynamic of a binary system --- p.4
Chapter 1.4 --- Nucleation and growth --- p.5
Chapter 1.5 --- Spinodal decomposition --- p.7
References --- p.10
Figures --- p.11
Chapter Chapter 2: --- Experimental setup and techniques --- p.21
Chapter 2.1 --- How to achieve high undercooling? --- p.21
Chapter 2.2 --- Preliminary steps --- p.22
Chapter 2.2.1 --- Preparation of dehydrated B203 --- p.22
Chapter 2.2.2 --- Preparation of the apparatus --- p.23
Chapter 2.2.3 --- Preparation of Ni2P --- p.23
Chapter 2.2.4 --- Alloying --- p.23
Chapter 2.3 --- Experiment --- p.24
Chapter 2.3.1 --- Preparation of pure glass --- p.24
Chapter 2.3.2 --- Anneal the glass pieces at different temperature for 30 minutes… --- p.24
Chapter 2.4 --- Investigation --- p.25
Chapter 2.4.1 --- Thermal Properties --- p.25
Chapter 2.4.2 --- TEM observation --- p.25
References --- p.27
Figures --- p.28
Chapter Chapter 3: --- Crystallization kinetics of amorphous nanostructured materials --- p.32
Abstract --- p.32
Chapter 3.1 --- Introduction --- p.33
Chapter 3.2 --- Experimental --- p.34
Chapter 3.3 --- Results and Discussion --- p.35
References --- p.41
Figures --- p.42
"Formation and crystallization of amorphous nanostructured materials =: 非晶納米材料的形成與結晶". 1998. http://library.cuhk.edu.hk/record=b5889706.
Pełny tekst źródłaThesis (M.Phil.)--Chinese University of Hong Kong, 1998.
Includes bibliographical references (leaf 47).
Text in English; abstract also in Chinese.
by Leung Ching Chuen.
Acknowledgments --- p.ii
Abstract --- p.iii
Chapter Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Expansion of the Mesoscopic World --- p.2
Chapter 1.2 --- Nanostructured Materials --- p.3
Chapter 1.3 --- A New Age --- p.4
Chapter 1.4 --- """Flaws"" of the New Age" --- p.5
Chapter 1.5 --- Phase Transformation --- p.7
Chapter 1.6 --- Nucleation and Growth --- p.8
Chapter 1.7 --- Spinodal Decomposition --- p.11
Chapter 1.8 --- Morphology Change during Spinodal Decomposition --- p.13
References --- p.16
Figures --- p.17
Chapter Chapter 2 --- Experiment --- p.25
Chapter 2.1 --- Experimental Preparations --- p.27
Chapter 2.1.1 --- Fused Silica Tube Preparation --- p.27
Chapter 2.1.2 --- Alloying --- p.27
Chapter 2.2 --- Experimental Procedures --- p.28
Chapter 2.2.1 --- Fluxing --- p.28
Chapter 2.2.2 --- Undercooling --- p.29
Chapter 2.3 --- Sample Analysis --- p.30
Chapter 2.3.1 --- Surface Analysis --- p.30
Chapter 2.3.2 --- Differential Scanning Calorimetry (DSC) --- p.30
Chapter 2.3.3 --- Hardness Testing --- p.31
Chapter 2.3.4 --- Optical Microscopy --- p.32
Chapter 2.3.5 --- Scanning Electron Microscopy (SEM) --- p.32
Chapter 2.3.6 --- Transmission Electron Microscopy (TEM) --- p.32
Chapter 2.3.7 --- X-ray Powder Diffraction (XPD) --- p.33
References --- p.34
Figures --- p.35
Chapter Chapter 3 --- Mechanism of Bulk Nanostructured Material Formation by Metastable Liquid State Spinodal Decomposition --- p.38
Abstract --- p.39
References --- p.47
Figures --- p.48
Chapter Chapter 4 --- Formation of Amorphous Nanostructured Material --- p.57
Abstract --- p.58
References --- p.66
Figures --- p.67
Chapter Chapter 5 --- Crystallization Kinetics of Amorphoous Nanostructured Alloy --- p.75
Abstract --- p.76
References --- p.85
Figures --- p.86
Chapter Chapter 6 --- Conclusion --- p.101
Knutson, Christopher C. "The chemistry and device applications of amorphous thin-film interfaces". Thesis, 2011. http://hdl.handle.net/1957/26076.
Pełny tekst źródłaGraduation date: 2012
Access restricted to the OSU Community at author's request from Dec. 13, 2011 - Dec. 13, 2012
Akin, Minta Carol 1980. "Low-energy electron driven reactions in layered methanol/amorphous solid water films". Thesis, 2008. http://hdl.handle.net/2152/3815.
Pełny tekst źródłaYou, Yumin. "Modulation of molecular mobility in sucrose-based amorphous solids detected by phosphorescence of erythrosin B". 2007. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17034.
Pełny tekst źródłaValanathan, Munsami. "Experimental investigation and theoretical analysis of the structural relaxation in amorphous Fe40Ni40B20". Thesis, 1998. http://hdl.handle.net/10413/4630.
Pełny tekst źródłaThesis (Ph.D.)-University of Natal, Durban, 1998.
"Preparation of bulky ferromagnetic Fe₈₀P₁₃C₇ amorphous alloy". 2000. http://library.cuhk.edu.hk/record=b5890327.
Pełny tekst źródłaThesis (M.Phil.)--Chinese University of Hong Kong, 2000.
Includes bibliographical references.
Text in English; abstracts in English and Chinese.
Chan Fu-wai = Fei jing tai tie ci xing tie-lin-tan he jin de zhi zuo / Chen Fuwei.
Acknowledgments --- p.i
Abstract --- p.ii
Table of Content --- p.iv
Chapter Chapter 1: --- Introduction --- p.1
Chapter 1.1 --- Nucleation --- p.1
Chapter 1.1.1 --- Homogenous nucleation --- p.1
Chapter 1.1.2 --- Heterogeneous nucleation --- p.4
Chapter 1.2 --- The crystal growth --- p.5
Chapter 1.2.1 --- The solid-liquid interface --- p.5
Chapter 1.2.2 --- Lateral growth --- p.6
Chapter 1.2.3 --- Continuous growth --- p.6
Chapter 1.3 --- Non-equilibrium process --- p.8
Chapter 1.3.1 --- Reduction of impurities --- p.8
Chapter 1.3.2 --- Suppression of crystal growth --- p.8
Chapter 1.4 --- The change in metallurgy --- p.9
Chapter 1.4.1 --- The metallic glass --- p.9
Chapter 1.4.2 --- The properties of glass --- p.10
Chapter 1.4.3 --- The development of amorphous alloy --- p.11
Chapter 1.5 --- Preparation methods of amorphous alloy --- p.12
Chapter 1.6 --- The criterion of glass formation --- p.14
Chapter 1.7 --- The study of this project --- p.15
Reference --- p.16
Figure --- p.19
Chapter Chapter 2: --- Experiment --- p.36
Chapter 2.1 --- Preparation --- p.36
Chapter 2.2 --- Experimental procedure --- p.37
Chapter 2.3 --- Sample analysis --- p.38
Reference --- p.41
Figure --- p.42
Chapter Chapter 3: --- The formation of bulk ferromagnetic Fe-P-C amorphous alloy --- p.45
Abstract --- p.45
Introduction --- p.46
Experiment --- p.47
Result --- p.48
Reference --- p.49
Figure --- p.52
Chapter Chapter 4: --- Compaction of bulk ferromagnetic Fe-P-C amorphous alloy --- p.57
Abstract --- p.57
Introduction --- p.58
Experiment --- p.58
Result --- p.60
Reference --- p.61
Figure --- p.62
Chapter Chapter 5: --- Conclusion --- p.65
Matteucci, Michal Elizabeth 1977. "Highly supersaturated aqueous solutions by design of amorphous pharmaceutical nanoparticles". 2007. http://hdl.handle.net/2152/16019.
Pełny tekst źródłatext
"Amorphous phase separation in a bulk metallic glass of negative heat of mixing". 2012. http://library.cuhk.edu.hk/record=b5549408.
Pełny tekst źródła為了解決這個難題,示差掃描量熱儀、高分辨電子顯微鏡、掃描透射模式下的高角環射暗場相、以及能量色散X射線光譜儀等檢測儀器在我們實驗當中被使用。同時為了清楚展示非晶相分離反應,在過冷Pd₄₁.₂₅Ni₄₁.₂₅P₁₇.₅熔體被冷卻為固態非晶樣品之前引入了中間熱退火處理。
實驗研究了三種經由不同路徑製備的A、B、C型號樣品。結果表明在非晶/液態Pd₄₁.₂₅Ni₄₁.₂₅P₁₇.₅合金中可能存在獨特的短程有序結構,它會導致相分離的發生。同时研究發現,在大約625 K,調幅分解的持續時間的下限大概是200 s。調幅分解的時間常數R在大約625 K 下為0.002 s⁻¹。三种类型样品在不同的溫度下被退火從而獲得部分的結晶。A型號和B型號具有相似的行為。在低溫下,圓形的核心首先形成,接著發生共晶反應。在高溫下,出現了一種形狀為立方體的析出相。在C型號的樣品當中,核心和立方的析出物同時被發現。但是核心的成分分佈與A和B型號中出現的不同。同時,隨著退火時間的加長形核的數量也具有獨特的行為表現。作為對比,Pd₄₀Ni₄₀P₂₀塊狀金屬玻璃的結晶行為也被展開了研究。同樣的,以形成核心開始,但是它的成分分佈異於A和B型號的樣品。
Amorphous phase separation in metallic glass (including bulk metallic glass) has been a controversial issue in the past several decades. There are reports saying that amorphous phase separation occurs in Pd-Ni-P, which has a negative heat of mixing among its constituent elements. However, there are also as many reports claiming that phase separation is absent in amorphous Pd-Ni-P alloys. The lack of direct experimental evidence makes the issue to be difficult to be resolved.
To solve this problem, differential scanning calorimetry (DSC), high resolution transmission electron microscopy (HRTEM), high angle annular dark field (HAADF) in scanning transmission electron microscopy, and energy dispersive X-ray spectroscopy (EDX) have been employed. Intermediate thermal annealing is introduced before an undercooled Pd₄₁.₂₅Ni₄₁.₂₅P₁₇.₅ melt is cooled down to become a solid amorphous specimen.
A-type, B-type, and C-type specimens of composition, Pd₄₁.₂₅Ni₄₁.₂₅ P₁₇.₅, have been prepared via three different cooling paths. It was found that amorphous phase separation indeed occurs in C-type specimens. Results suggest that there may be unique short range orders in amorphous/liquid Pd₄₁.₂₅Ni₄₁.₂₅P₁₇.₅, which are responsible for the phase separation. Experimental arrangements were made to study the occurrence of spinodal reaction in undercooled molten Pd₄₁.₇₅Ni₄₁.₇₅P₁₇.₅ alloys as a function of time. The lower bound of the duration of the spinodal decomposition at a temperature of {U+2248}625 K is about 200 s and the time constant R of the spinodal decomposition at a temperature of {U+2248}625 K is 0.002 s⁻¹.
A-type and B-type specimens have similar crystallization behavior. At low temperature, it starts with the formation of a spherical core and then eutectic crystallization takes over. At higher temperatures, an additional phase in the shape of a cube appears. In annealed C-type specimens, cores and cubic precipitates are also found. However, the composition profile of the cores is different and the number of nucleation events versus time has peculiar characteristics. The crystallization behavior of Pd₄₀Ni₄₀P₂₀ BMG was studied for comparison. It again starts out with the formation of a core, but with a composition profile different from those of A-type and B-type specimens.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Detailed summary in vernacular field only.
Lan, Si = 對於具有負混合熱的塊狀金屬玻璃非晶相分離的研究 / 蘭司.
Thesis (Ph.D.)--Chinese University of Hong Kong, 2012.
Includes bibliographical references.
Abstract also in Chinese.
Lan, Si = Dui yu ju you fu hun he re de kuai zhuang jin shu bo li fei jing xiang fen li de yan jiu / Lan Si.
Abstract of thesis --- p.i
Acknowledgements --- p.v
List of Tables --- p.x
List of Figures --- p.xi
Chapter Chapter 1 --- Introduction and literature review --- p.1
Chapter 1.1 --- Introduction to metallic glasses --- p.1
Chapter 1.1.1 --- Background of metallic glasses --- p.1
Chapter 1.1.2 --- Glass transition --- p.2
Chapter 1.1.3 --- The undercooling of liquids --- p.3
Chapter 1.1.4 --- Crystal nucleation and growth in liquids --- p.3
Chapter 1.1.4.1 --- Crystal Nucleation in liquids --- p.3
Chapter 1.1.4.2 --- Crystal growth in liquids --- p.5
Chapter 1.1.4.3 --- TTT diagram --- p.6
Chapter 1.1.4.4 --- Crystallization in metallic glasses --- p.6
Chapter 1.1.5 --- Glass formation methods and systems --- p.6
Chapter 1.1.6 --- Glass forming ability and criteria --- p.8
Chapter 1.1.7 --- Properties and applications --- p.9
Chapter 1.2 --- The basic theory of phase separation in a binary system --- p.10
Chapter 1.2.1 --- Thermodynamic background --- p.10
Chapter 1.2.2 --- Solid state phase separation --- p.11
Chapter 1.2.2.1 --- A miscibility gap of binary mixture --- p.11
Chapter 1.2.2.2 --- Nucleation and growth mechanism --- p.12
Chapter 1.2.2.3 --- Spinodal decomposition mechanism --- p.13
Chapter 1.2.3 --- Liquid state miscibility gap in a binary system --- p.21
Chapter 1.3 --- Literature review for phase separation in metallic glasses --- p.23
Chapter 1.4 --- The aim of this thesis --- p.28
Figures --- p.30
References --- p.39
Chapter Chapter 2 --- Experiments and characterization --- p.44
Chapter 2.1 --- Introduction and the outline of the experiments --- p.44
Chapter 2.2 --- Sample preparation --- p.45
Chapter 2.2.1 --- Bulk metallic glasses preparation --- p.45
Chapter 2.2.1.1 --- Preparation of clean fused silica tubes --- p.45
Chapter 2.2.1.2 --- Weighing --- p.46
Chapter 2.2.1.3 --- Alloying --- p.46
Chapter 2.2.1.4 --- Fluxing --- p.47
Chapter 2.2.2 --- Thermal annealing --- p.49
Chapter 2.2.3 --- Specimens preparation for characterization --- p.50
Chapter 2.2.3.1 --- Cutting, molding, grinding and polishing --- p.50
Chapter 2.2.3.2 --- Etching --- p.51
Chapter 2.2.3.3 --- Thinning for TEM foils --- p.51
Chapter 2.3 --- Characterization --- p.55
Chapter 2.3.1 --- Differential scanning calorimetry (DSC) --- p.55
Chapter 2.3.2 --- Scanning electron microscopy (SEM) --- p.55
Chapter 2.3.3 --- Transmission electron microscopy (CTEM and HRTEM) --- p.57
Chapter 2.3.4 --- High angle annular dark field (HAADF) in Scanning transmission electron microscopy (STEM) --- p.58
Chapter 2.3.5 --- Energy dispersive X-ray spectroscopy (EDX) --- p.59
Figures --- p.62
References --- p.69
Chapter 3 --- p.70
Chapter 3.1 --- Introduction --- p.70
Chapter 3.2 --- Materials and Experimental --- p.73
Chapter 3.3 --- Results --- p.75
Chapter 3.3.1 --- Thermal behaviors of three types of specimens --- p.75
Chapter 3.3.2 --- Microstructures of three types of specimens --- p.75
Chapter 3.3.2.1 --- A-type specimens --- p.75
Chapter 3.3.2.2 --- B-type specimens --- p.76
Chapter 3.3.2.3 --- C-type specimens --- p.76
Chapter 3.4 --- Discussion --- p.78
Chapter 3.5 --- Conclusions --- p.79
Chapter 3.6 --- Afterward --- p.79
Figures --- p.80
References --- p.89
Chapter Chapter 4 --- The time constant of the spinodal decomposition in Pd₄₁.₇₅Ni₄₁.₇₅P₁₇.₅ bulk metallic glasses --- p.92
Chapter 4.1 --- Introduction --- p.92
Chapter 4.2 --- Materials and experimental --- p.92
Chapter 4.3 --- Results --- p.94
Chapter 4.3.1 --- Thermal behaviors --- p.94
Chapter 4.3.2 --- Microstructures --- p.94
Chapter 4.4 --- Discussion --- p.96
Chapter 4.5 --- Conclusions --- p.98
Figures --- p.100
References --- p.123
Chapter Chapter 5 --- Crystallization in homogeneous and phase-separated Pd₄₁.₂₅Ni₄₁.₂₅P₁₇.₅ bulk metallic glasses --- p.125
Chapter 5.1 --- Introduction --- p.125
Chapter 5.2 --- Experiments --- p.126
Chapter 5.3 --- Results --- p.128
Chapter 5.3.1 --- Low temperature thermal annealing at 613 K with 0≤t{U+2090} ≤ 8 h --- p.128
Chapter 5.3.1.1 --- A-type and B-type specimens --- p.128
Chapter 5.3.1.2 --- C-type specimens --- p.130
Chapter 5.3.1.3 --- Pd₄₀Ni₄₀P₂₀ BMG --- p.132
Chapter 5.3.2 --- High temperature thermal annealing --- p.133
Chapter 5.3.2.1 --- A-type and B-type specimens --- p.133
Chapter 5.3.2.2 --- C-type specimens --- p.135
Chapter 5.3.2.3 --- Pd₄₀Ni₄₀P₂₀ BMG --- p.137
Chapter 5.4 --- Discussion --- p.137
Chapter 5.4.1 --- Formation of spherical cores --- p.138
Chapter 5.4.1.1 --- A-type and B-type Pd₄₁.₇₅Ni₄₁.₇₅P₁₇.₅ specimens --- p.138
Chapter 5.4.1.2 --- C-type Pd₄₁.₇₅Ni₄₁.₇₅P₁₇.₅ specimens --- p.139
Chapter 5.4.1.3 --- Pd₄₀Ni₄₀P₂₀ BMG --- p.140
Chapter 5.4.2 --- Formation of cubic precipitates --- p.141
Tables --- p.142
Figures --- p.144
References --- p.188
Chapter Chapter 6 --- Conclusions --- p.190
Bibliography --- p.192
Hsu, Lung-chern, i 許榮宸. "Calculation and Conformatuonal Analysis of Starburst Amorphous TPA-derived Substances for Organic Light Emitting Diode(OLED)". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/06785960541502084906.
Pełny tekst źródła國立成功大學
化學系專班
96
We used DFT B3LYP/6-31g*method to calculate TDATA(4,4'4"-tris (diphenylamino)triphenyl) and TDAB(1,3,5-tris-(diphenylamine)benzene) TDAPB(1,3,5-tris(4-diphenylaminophenyl)benzene.the main difference in its certre unit,TDATA regards atom of nitrogen as the centre.TDAPB and TDAB regards phenyl ring as the centre.TDAPB and TDAB difference lie in the centre phenyl ring connects triphenylamine and diphenylamine.In the energy level that these starburst amorphous molecular appear high HOMO and ionization potential is TDAB>TDAPB>TDATA.connect as it methyl and fluoro substituent on the ortho meta and para position is it connect fluoro substituent their IP will increase and meta>para>ortho.connect methyl substituent their TDATA and TDAPB IP will decrease and ortho>meta>para.TDAB will increase on the ortho and it will decrease on the meta and para(meta>para).In the conformatios that neutral molecule of starburst amorphous molecular that its TPA structure moiety bond length is 1.4193~1.4231A0 and dihedral angle is 69~720. because of three-dimensional obstacle connect methyl or fluoro substituent bond length and dihedral angle can produce change on the ortho position.Analyse the respect in the density of charge ,we is it kown by Mulliken charge density all nitrogen atom of neutral molecule of starburst amorphous molecular bring negative charge its value distribute -0.65~ -0.66 , and phenyl ring bring positive charge its value distribute 0.21~0.22 and phenyl ring can add get intoing with figure of atom of nitrogen,connect as it methyl and fluoro substituent and substituent figure can not influence above-mentioned nature on the ortho meta and para position.And while distributing by setting up the Mulliken charge density ,cation molecule and the neutral molecule that amount of difference distributed of charge are right compared with MO of the molecule,we can prove the charge is transmitted that the route is distributed in the HOMO area of the cation molecule from the HOMO area of the neutral molecule .
Sheppard, Charles Johannes. "Structural and optical characterization of Si:H and ZnO". Thesis, 2008. http://hdl.handle.net/10210/1365.
Pełny tekst źródłaThin film solar cell devices based on amorphous silicon absorber films are promising candidates for the efficient conversion of sunlight into useable, cheap electrical energy. However, typical device structures are rather complex and consist of semiconductor/metal contacts as well as a complicated p-i-n junction. Against this background, the present study focussed on the optimization of certain key components of the device, including the transparent conductive oxide, amorphous silicon absorber layers and substrate/metal structures. These thin films were deposited by direct current (DC) magnetron sputtering and radio frequency (RF) capacitativecoupled gas discharge. In each case, a systematic study was conducted in which all the relevant processing parameters were varied over a broad range. The material quality of the respective films was subsequently correlated against the growth parameters. In the case of DC magnetron sputtered ZnO, w hich is generally used as a transparent conductive oxide in the device structure, the material quality were critically influenced by geometric orientation of the sample with respect to the target, the substrate-target distance, deposition power, working pressure and substrate temperature. Optimum structural, optical and electrical properties were obtained in the case of samples deposited at an angle of 80° with respect to the surface of the target. Bombardment damage was to a large extent prevented when the samples were placed at a vertical substrate-to-target distance of 70 mm, 75 mm away from the center zone of the plasma. The optimum substrate temperature, deposition power and working pressure was experimentally found to be 100°C; 600 mW/cm2 and 5.25 ´ 10-3 Torr, respectively. The structural features of the substrates influenced the morphology and optical properties of the DC sputtered metallic films. In general, the surface roughness increased when the glass substrates were replaced by kapton. The glass/silver structures were characterized by relatively smooth surface morphologies, while glass/aluminium films exhibited spike-like growth features. The material properties of intrinsic amorphous silicon were influenced by the RF power, substrate temperature and deposition pressure. A systematic study revealed optimum structural, optical and electrical properties at depositions powers around 43 mW/cm2, substrate temperatures close to 200°C and deposition pressures in the order of 500 mT.
Professor V. Alberts
Cowell, E. William III. "Electronic device and nanolaminate application of amorphous metal thin films". Thesis, 2012. http://hdl.handle.net/1957/29124.
Pełny tekst źródłaGraduation date: 2012
Access restricted to the OSU Community at author's request from May 9, 2012 - May 9, 2013
"Preparation and characterization of bulk amorphous and nanostructured iron-40 nickel-40 phosphorus-14 boron-6 alloys". 2002. http://library.cuhk.edu.hk/record=b6073403.
Pełny tekst źródłaThe numerals in title is subscript.
Thesis (Ph.D.)--Chinese University of Hong Kong, 2002.
Includes bibliographical references.
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Mode of access: World Wide Web.
Abstracts in English and Chinese.