Tesis sobre el tema "TiAlN coating"
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Landälv, Ludvig. "Samband mellan tjockleken hos PVD-skikt och förslitningsbeteendet vid svarvning". Thesis, Luleå Tekniska Universitet, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-127729.
Texto completoKhetan, Vishal. "High temperature oxidation and wear properties of magnetron sputtered AlTiTaN based hard coatings". Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/225493.
Texto completoDoctorat en Sciences de l'ingénieur et technologie
info:eu-repo/semantics/nonPublished
OSTROVSKAYA, OXANA. "Oxidation resistance of Ti-Al intermetallic alloys and protection by ceramic coating". Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2705474.
Texto completoDenisov, V. N., B. N. Mavrin, E. A. Vinogradov, S. N. Polyakov, A. N. Kirichenko, K. V. Gogolinsky, A. S. Useinov et al. "Characterization of TiAlN coatings". Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20448.
Texto completoLembke, Mirkka Ingrid. "Oxidation behaviour of TiAlN based nanolayered hard coatings". Thesis, Sheffield Hallam University, 2001. http://shura.shu.ac.uk/19951/.
Texto completoPilemalm, Robert. "TiAlN-based Coatings at High Pressures and Temperatures". Licentiate thesis, Linköpings universitet, Nanostrukturerade material, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-112213.
Texto completoZhou, Zhaoxia. "Oxidation and wear of TiAlN/VN multilayer PVD hard coatings". Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557419.
Texto completoBeevers, Caroline F. "Structural and tribological properties of TiAlN coatings deposited by CFUBMS". Thesis, University of Salford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395861.
Texto completoNorrby, Niklas. "Microstructural evolution of TiAlN hard coatings at elevated pressures and temperatures". Doctoral thesis, Linköpings universitet, Nanostrukturerade material, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-106507.
Texto completoZaroulias, Antonios. "Development of TiAlCr-X coatings for TiAl based alloys". Thesis, University of Surrey, 2004. http://epubs.surrey.ac.uk/844081/.
Texto completoForsén, Rikard, M. P. Johansson, Magnus Odén y Naureen Ghafoor. "Effects of Ti alloying of AlCrN coatings on thermal stability and oxidation resistance". Linköpings universitet, Nanostrukturerade material, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93255.
Texto completoFunding Agencies|SSF project Designed multicomponent coatings, MultiFilms||
Fukátková, Pavla. "Zkřehnutí TiAl intermetalik indukované oxidací povrchu". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228935.
Texto completoKamath, Ganesh K. "Micro-structural and functional properties of TiAlCN/VCN coating produced by High Power Impulse Magnetron Sputtering Technology". Thesis, Sheffield Hallam University, 2011. http://shura.shu.ac.uk/20171/.
Texto completoWang, Zhiqi. "Study of Ti-Al-Cr oxidation resistant coatings for γ-TiAl based intermetallic alloys". Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/844155/.
Texto completoStraubel, Ariane. "Gefüge-Eigenschaftsbeziehung einer TiAl-Legierung mit Oxidationsschutz und Wärmedämmschicht". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-224085.
Texto completoRovere, Florian [Verfasser]. "Theoretical and experimental assessment of Cr-Al-Y-N as protective coating for y-TiAl based alloys / Florian Rovere". Aachen : Shaker, 2010. http://d-nb.info/1104047985/34.
Texto completoCalamba, Katherine. "Phase stability and defect structures in (Ti1-x,Alx)Ny hard coatings". Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0322.
Texto completoThis study highlights the role of nitrogen vacancies and defect structures in engineering hard coatings with enhanced phase stability and mechanical properties for high temperature applications. Titanium aluminum nitride (Ti,Al)N based materials in the form of thin coatings has remained as an outstanding choice for protection of metal cutting tools due to its superior oxidation resistance and high-temperature wear resistance. High-temperature spinodal decomposition of metastable (Ti,Al)N into coherent c-TiN and c-AlN nm-sized domains results in high hardness at elevated temperatures. Even higher thermal input leads to transformation of c-AlN to w-AlN, which is detrimental to the mechanical properties of the coating. One mean to delay this transformation is to introduce nitrogen vacancies. In this thesis, I show that by combining a reduction of the overall N-content of the c-(Ti,Al)Ny (y < 1) coating with a low substrate bias voltage during cathodic arc deposition an even more pronounced delay of the c-AlN to w-AlN phase transformation is achieved. Under such condition, age hardening is retained until 1100 °C, which is the highest temperature reported for (Ti,Al)N films. During cutting operations, the wear mechanism of the cathodic-arc-deposited c-(Ti0.52Al0.48)Ny with N-contents of y = 0.92, 0.87, and 0.75 films are influenced by the interplay of nitrogen vacancies, microstructure, and chemical reactions with the workpiece material. The y = 0.75 coating contains the highest number of macroparticles and has an inhomogeneous microstructure after machining, which lower its flank and crater wear resistance. Age hardening of the y = 0.92 sample causes its superior flank wear resistance while the dense structure of the y = 0.87 sample prevents chemical wear that results in excellent crater wear resistance. Heteroepitaxial c-(Ti1-x,Alx)Ny (y = 0.92, 0.79, and0.67) films were grown on MgO(001) and (111) substrates using magnetron putter deposition to examine the details of their defect structures during spinodal decomposition. At 900 °C, the films decompose to form coherent c-AlN- and c-TiN- rich domains with elongated shape along the elastically soft <001> direction. Deformation maps show that most strains occur near the interface of the segregated domains and inside the c-TiN domains. Dislocations favorably aggregate in c-TiN rather than c-AlN because the later has stronger directionality of covalent chemical bonds. At elevated temperature, the domain size of (001) and (111)- oriented c-(Ti,Al)Ny films increases with the nitrogen content. This indicates that there is a delay in coarsening due to the presence of more N vacancies in the film. The structural and functional properties (Ti1-x,Alx)Ny are also influenced by its Al content (x). TiN and (Ti1-x,Alx)Ny (y = 1, x = 0.63 and x = 0.77) thin films were grown on MgO(111) substrates using magnetron sputtering technique. Both TiN and Ti0.27Al0.63N films are single crystals with cubic structure. (Ti0.23,Al0.77)N film has epitaxial cubic structure only in the first few atomic layers then it transitions to an epitaxial wurtzite layer, with an orientation relationship of c-(Ti0.23,Al0.77)N(111)[1-10]ǀǀw-(Ti0.23,Al0.77)N(0001)[11-20]. The w-(Ti0.23,Al0.77)N shows phase separation of coherent nm-sized domains with varying chemical composition during growth. After annealing at high temperature, the domains in w-(Ti0.23,Al0.77)N have coarsened. The domains in w-(Ti0.23,Al0.77)N are smaller compared to the domains in c-(Ti0.27,Al0.63)N film that has undergone spinodal decomposition. The results that emerged from this thesis are of great importance in the cutting tool industry and also in the microelectronics industry, because the layers examined have properties that are well suited for diffusion barriers
Gateau, Romain. "Comportement vis-à-vis de la corrosion à haute température de métaux (Ti, TA6V) revêtus d'aluminiure de titane". Phd thesis, Université de Bourgogne, 2010. http://tel.archives-ouvertes.fr/tel-00689142.
Texto completoPal, Terek. "Unapređenje kvaliteta alata za livenje pod pritiskom primenom tehnologija inženjerstva površina". Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2016. http://www.cris.uns.ac.rs/record.jsf?recordId=101472&source=NDLTD&language=en.
Texto completoCorrosion resistance and soldering tendency of different materials in moltenAl–Si–Cu alloy were studied. Hot-working tool steel, plasma nitrided steel andduplex layers with CrN, TiAlN, TiAlSiN and CrAlN top coatings, which wereproduced to various degree of surface roughness, were covered by the study.An ejection test was employed for investigation of the concerned phenomena.The ejection test was improved in order to increase its accuracy and thereliability of process simulation. Samples were examined in both short andextended periods of contact (5 and 20 min) with liquid casting. Castingsolidification was extended in order to intensify the corrosion effects. Contraryto common findings, it was found that the ejection force of the investigatedmaterials does not depend on their chemical composition. For the coatedsamples, a pronounced dependence of the ejection force on the surfaceroughness was found. The ejection force increases with decrease in surfaceroughness. All investigated coatings are prone to mechanical soldering by Al–Si–Cu alloy. Still, their corrosion resistance substantially exceeds the corrosionresistance of steel and plasma nitrided layer. Longer exposure of coatedsamples to cast alloy induced lower ejection forces, which is a consequenceof coatings oxidation. It was found that the investigated coatings are inert toliquid aluminium. However, the underlying material undergoes oxidation andcorrosion through coating growth defects. The findings concerning the wearmechanisms of protective layers support further development of duplex layersintended for die casting tools protection.
饒建平. "Study of the Wear Characteristic for TiAlN Coating Tools Cutting". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/87282024839272619636.
Texto completo國立彰化師範大學
電機工程學系
102
Abstract The growth of machine tool manufacturing industry in recent years brings the improvement of precise machine processing technology and the increasing demand of cutting tools. Since the cutting tools are consumption material, it becomes an urgent problem to be solve to extend the lifetime and wear out problem of cutting tool. In this study, the characteristic of TiAlN tool coating is applied on the cutting tool with the metal feature of wearlessness and heat resistant in TiAlN, which optimizes the cutting tool life time and saves the production cost on machinery manufacturing. Through the data of experiment and scanning electron microscope (SEM) to observe the condition of coating components and compare the variance for further understanding of cutting tool life time. The experiment on indentation hardness is mainly operated on coating to analyze the wearlessness hardness of different coating materials. The difference to two cutting tools is therefore identified according to the material experiments and statics data compression by SPC control chart. The result shows that cutting tools with TiAIN coating reduces the wearness of cutting tools. Also, the hardness is increased and the tolerance is reduced to less than 56% during processing, this considerably increases the lifetime of cutting tools. Moreover, 47 % of the manufacturing cost is saved with the practical value for industry. Keywords: TiAlN Coating、Tungsten Carbide Cutting Tool、SPC、Average Variance。
Chen, Wei-Chih y 陳威池. "Synthesis and characterizations of TiSiN/TiAlN multilayer coating by cathodic arc plasma evaporation". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/67638116303993904379.
Texto completo明道大學
材料暨系統工程研究所
95
In this work, nano-multilayer TiSiN/TiAlN films have been deposited on WC-Co substrates by using TiSi (80:20 at.%) and TiAl (50:50 at.%) alloy target on a dual cathodic arc plasma evaporation system. The influences of bias voltages, holder speed rotation and reaction gas pressure varied on the microstructure, adhesion strength and tribological properties of the films were investigated. Scanning electron microscopy (SEM), X-ray diffraction (XRD) techniques were employed to analysis the microstructure, grain size, residual stress and bi-layer thickness. Corrosion test were used by Potentiostat to analysis the corrosion potential. Vicker’s hadrness and tribometer tester were used to measure the mechanical and tribological properties of nano-multilayer TiSiN/TiAlN thin films. The results showed that the hardness of the films ranged from 24-27 GPa, which the value is lower than both of TiAlN (29 GPa) and TiSiN (35 GPa). The coefficient of steady-state friction of the films against Cr steel ball ranged from 0.45 to 0.6, and TiSiN and TiAlN is 0.6 and 0.7, respectively. It has been found that the microstructure, adhesion strength and wear properties of the films were dependent on bias voltage, interlayer design bi-layer thickness and grain size in film structure, resulting from both improved adhesion strength and wear properties of nano-multilayer TiSiN/TiAlN coatings.
Lai, Kuei-Laing y 賴奎良. "Study on Coating Characteristics and Corrosive Behaviors of ADI Deposited TiN/TiAlN by CAPD Method". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/13801995718167598599.
Texto completo大同大學
材料工程學系(所)
93
Austempered ductile iron (ADI) possesses high tensile strength, wear resistance, fatigue resistance and low cost, and it is widely applied on mechanical parts. In general, austempering temperature of ADI is in the range of Ms~450℃, thus, the traditional heat treatment at high temperature for case hardening is not available to treat ADI. This research used the method of cathodic arc plasma deposition (CAPD) to coat TiN/TiAlN on ADI substrate and explored the effect of the surface coatings on corrosion behaviors of ADI. Moreover, XRD, HRc and SEM were further utilized to analysis the various properties of the coating films. The results showed that the hardness of the coated ADI is higher than that of uncoated ADI. However, the surface of coated ADI specimens is rougher than that of uncoated ADI. The adhesion between film and ADI substrate is better than that between film and graphite substrate. After polarization curves test, it was found that the corrosion current of coated specimen is smaller than that of uncoated specimen. Moreover, in 10 Vol.%HCl and 10Vol.%H2SO4 solution , the coated specimens process the lower corrosion rate than uncoated specimen. Thus, it implied that ADI coated with TiN/TiAlN films can evidently raise the corrosion resistance in sea water,hydrochloric acid and sulphuric acid.
Verma, Nisha. "Mechanism and Modeling of Contact Damage in ZrN-Zr and TiAIN-TiN Multilayer Hard Coatings". Thesis, 2012. http://hdl.handle.net/2005/3171.
Texto completoLlanos, Princess Stephanie. "Characterization of industrial made TiAlN, TiAlCN and TiAlN/TiAlCN coatings used for machining of Ti6Al4V aerospace alloy". Master's thesis, 2021. http://hdl.handle.net/10316/95529.
Texto completoA investigação e desenvolvimento de ligas de titânio tem vindo a ser alvo de estudo durante as últimas décadas devido às suas superiors propriedades físicas, químicas e mecânicas quando comparado com outros ligas. No entanto, o fabrico de components em ligas de titânio é mais caro e requer mais tempo de processamento em comparação com outros metais devido à sua grande dificuldade de maquinar. Uma das principais soluções atualmente usadas para melhorar a maquinação das ligas de titânio é a aplicação de revestimentos na superficie das ferramentas de corte, que por um lado permitem aumentar a vida de ferramenta de corte e por outro melhorar a qualidade da superfície maquinada. Nesta tese, revestimentos industriais depositados em monocamada (TiAlN, TiAlCN) e em multicamada (TiAlN/TiAlCN) foram caracterizados relativamente a diferentes propriedades para determiner quais dos revestimentoa apresentam o melhor compromisso entre propriedades. Os revestimentos depositados foram caracterizados quanto à sua composição química, estrutura, morfologia, resistência à oxidação, estabilidade térmica, propriedades mecânicas e comportamento tribológico à temperatura ambiente. Como esperado os revestimentos apresentam diferentes composições químicas de Ti, Al, N e C devido à diferente composição dos alvos usados e potência aplicadas aos alvos durante a deposição. Todos os revestimentos apresentam uma estrutura fcc. A morfologia dos revestimentos em secção transversal exibem um crescimento columnar, onde o revestimento TiAlN apresenta uma morfologia mas densa do ques os outros revestimentos. O ponto de início de oxidação dos revestimentos é dependente da composição química dos revestimentos: ~900°C, ~850°C e ~800°C para os revestimentos TiAlN, TiAlCN e TiAlN/TiAlCN, respectivamente. Os testes isotérmicos realizados às amostras a 900°C durante 2 h aos revestimentos, promoveram a total oxidação dis revestimentos TiAlCN e TiAlN/TiAlCN, enquanto que o revestimento TiAlN foi apenas parcialmente oxidado. A notável resistência à oxidação do revestimento TiAlN deve-se à formação de uma camada continua e protetora de Al2O3 no topo da camada de óxido. A formação dessa fase foi identificada por difração de raios-x analyses SEM. O revestimento TiAlN/TiAlCN apresentou os maiores valores de dureza – 38 GPa e modulo de elastecidade – 363 GPa, entre os diferentes revestimentos. Após o recozimento, o revestimento TiAlN exibiu um grande aumento de dureza devido ao aumento da sua cristalinidade. Nos testes tribológicos, o coeficiente de atrito, a profundidade de desgaste e a taxa especifica de desgaste corroboram os resultados de dureza e tenacidade. As pistas de desgaste exibem um mecanismo de abrasão, caracterizadas pela presença de ranhuras e detritos. O revestiemnto TiAlN/TiAlCN apresentou o melhor desempenho tribológico devido à combinação de alta dureza e alta tenacidade à fratura em comparação coms outros revestimentos.
The research and development on titanium alloys have been nourishing for quite some time due to their superior physical, chemical and mechanical properties. However, manufacturing titanium is more expensive and requires longer time compared with other metals due to its poor machinability. One of the leading solutions to address the difficulty in machining titanium is to deposit coating on the cutting tools in order lengthen the service lifetime and ensure good quality of machined surface. In this study, industrial made monolithic TiAlN, monolithic TiAlCN and multilayered TiAlN/TiAlCN coatings were thoroughly characterized to determine which coating displayed the best combination of properties. The deposited coatings were fully characterized for their chemical composition, structure and morphology, oxidation resistance, thermal stability, mechanical properties and tribological performance at room temperature. The coatings reported different chemical composition of Ti, Al, N and C due to the different targets, chemical composition and power applied to the target during deposition. All films displayed a fcc NaCl type structure. The SEM micrographs of the cross-section and surface morphology of the as-deposited coatings exhibited a columnar growth with TiAlN showing the densest structure. The onset point of oxidation was measured to be ~900°C, ~850°C and ~800°C for TiAlN, TiAlCN and TiAlN/TiAlCN, respectively. After the isothermal test at 900°C for 2 h, TiAlCN and TiAlN/TiAlCN were fully oxidized while a huge portion of the TiAlN coating still exists. The remarkable oxidation resistance of the latter coating was driven by the formation of a continuous and protective oxide scale Al2O3 on top of the oxide layer. The presence of this oxide scale was confirmed by XRD, SEM micrograph and elemental map distribution. The as-deposited TiAlN/TiAlCN reported the highest H and E values at 38 GPa and 363 GPa, respectively. Upon annealing, TiAlN exhibited a huge increase in hardness due to increase in crystallinity. In the tribological tests, the coefficient of friction, wear depth and wear rate corroborate the hardness and toughness results of the coatings. The wear track exhibit abrasion mechanism which is characterized by grooves and scratches and the presence of wear debris in fish-like form. The multilayered TiAlN/TiAlCN showed the best tribological performance due to the combination of high hardness and high fracture toughness compared to the monolithic TiAlN and TiAlCN coatings.
Outro - Project MCTool21 - POCI-01-0247-FEDER-045940
Lin, Yi-Tang y 林義棠. "Study on Mechanical Properties by Sputtering TiAlCN Coating". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/41219660825242455484.
Texto completo國立高雄第一科技大學
機械與自動化工程所
91
In this research, we use the Taguchi method to design experiment procedure. We use separate target when we processed the sputtering. The target material are pure Ti and pure Al, the base material is high-speed steel. The (Ti,Al)CN coating layer is formed by magnetron sputtering. The purpose of this research is to find out the relation between different process parameters and coating film properties such as: surface pattern, microstructure, and mechanical properties etc. Through the study we especially focus on wear capability and try to find out the best process parameters to improve substrate mechanical properties in order to extend the using life. As the results of experiments, we find out such as th follows: 1、 By XRD’s analysis, the (Ti,Al)CN coating film has show the stronger ( 1 1 1 ) peak, lower friction coefficient, good wear-resistance and AlN phase was also shown when substrate bias increased gradually. 2、 The most coating layers have been worn out through wear test results, except the test R8 which was proceed by Ti0.75Al0.25 film compose, 35SCCM C2H2 flow rate, 4SCCM N2 flow rate and –75V substrate bias. And we also get the lowest friction coefficient which 0.203 and the maximum of layer thickness reached to 1.56μm in the test piece R8. 3、 According to the L9 (34) Taguchi experiment results, we have also found the optimum sputtering parameters were : Ti0.75Al0.25 film compose; 40SCCM C2H2 flow rate; 10SCCM N2 flow rate and –75V substrate bias. 4、 The friction coefficient(μ)of coating film is 0.185 when used optimum sputtering parameters by Taguchi confirm experiment. Comparing to high-speed steel substrate (μ=0.5), it has excellent wear-resistance capability and reduces friction force to improve material using life. 5、 The coating layer’s pressmark is HF3 and it has good adhesive strength (61.53N) by used optimum sputtering parameters. Besides, we also find extremely strong ( 1 1 1 ) X-Ray diffraction peak in the coating layer. To summarize all research results, adopting PVD (Ti,Al)CN coating film could improve high-speed steel wear-resistance capability and mechanical properties to extend material using life.
Chien, Wei-Te y 簡維德. "Study on TiAlON Decorative Coating by Cathodi Arc Plasma Deposition". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/63052074780935662780.
Texto completo明道大學
材料暨系統工程研究所
96
This study used cathode arc evaporation plasma deposition TiAlON thin film. It fixed N2 flow and tune up O2 flow to observe the colours of TiAlON. On any equipment that is used, L*a*b* control can display colours in number format to accurately compare the difference. To pigment properly, nearly hundred layers of coating are usually needed during the process to achieve the desired colours. Therefore, it is significant for the L*a*b control to attain precise colour each time during coating in order to achieve the efficiency. With its high stability, corrosion resistance, wear ability and hardness, vacuum coating is attracting great interest in the decorative-coating industry. The object of this research is to observe the chromaticity as TiAlON thin film is developed and deposited on the brass in Cathode Arc Evaporation System. The oxygen partial pressure applied during the deposition is measured to assist investigating its effect on the phase and chromaticity of TiAlON thin film. Through SEM, EDS, colours meter and optical microstructure, crystal experiment results are processed to analyze thin film morphology composition, microstructure and the colours chromaticity. Results of this study showed that the brightness of thin film will change by tune up O2 flow. If increasing more O2 flow, TiAlON thin film will get more dark, and the contact angle decreasing . After corrosion test, TiAlON thin film has better corrosion resistance than TiAlN.
Lee, Chien-Chih y 李建志. "Study on Characteristics of (Ti,TiAl)N/(Ti,TiAl)CN Mixed Coatings by Filtered CAD Process". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/44217153013193875027.
Texto completo大同大學
材料工程學系(所)
94
The work investigated to improve the defect of the bigger particle by Cathodic Arc Deposition (CAD) system with filtered. Because the TiN、TiAlN and TiCN coatings are popularly investigated before. Thereby, in this case, use a Ti target and TiAl target moreover N2 and C2H2 gases are through into with the process parameters to deposited (Ti,TiAl)N and (Ti,TiAl)CN two mixed films. They expect to obtain excellent properties besides to compare with filtered effect. Via knew with the experiment, the filter improves the defect of bigger particle, there are best improvement in roughness (Ra)、adhesion and porosity, moreover the structure cannot change. Also because the porosity decrease to improved with the corrosion resistance. But the particle decrease resulted in the decrease of depositing rate.
Yow, J.-S. y 游瑞松. "On Tribological Properties of TiAlN Coatings Deposited on High Speed Steel by Cathodic Arc Evaporation". Thesis, 1997. http://ndltd.ncl.edu.tw/handle/45919929093270050909.
Texto completo國立中興大學
材料工程學研究所
85
In this research,TiAlN films were deposited on high speed steel( SKH9) by cathodic arc evaporation.The effect of TiAl interlayer on the tribological properties of TiAlN films were investigated. The characteristics of the ternary TiAlNfilms have the properties of high hardness ,abrasion resistance and excellent chemical stability which all contribute to the success of TiN.A graded TiAlN structure is defined as a continuous variation of the various components,fromthe film/substrate interface to the top surface of the film during the growth.The bias voltage applied to the substrate is the primary parameter responsiblefor aluminum depletion and titanium enrichment in the film composition.XRD analysis showed that TiAlN films have strong (111) preferred orientation.Optimized critical load of TiAlN/ SKH9 were obtained at a substrate bias 300v, and with a interlayer thickness of 0.1*10^-6mTiAl.TiAlN graded coating exhibited the highest critical load of 57N while multilayer film measured 51N and singlelayer film measured 47N.The thermal stability of TiAlN film was investigated by TGD. The oxidation resistance of TiAlN exhibited much higher onset temperature of 890C/925C compared to of TiN,TiCN and CrN. This higher oxidation resistance of TiAlN protective layer was conjected to the fact stable Al2O3 atits surface when the coating reaches 600 C - 925 C in air .
Govindarajan, Sumanth. "Effect of Humidity and Temperature on Wear of TiN and TiAIN Coatings". Thesis, 2017. http://etd.iisc.ernet.in/2005/3648.
Texto completoTsai, Chia-Hang y 蔡嘉航. "Study on the Processing and properties of TiAlBN coatings by Unbalanced Magnetron Sputtering". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/89280704228611747573.
Texto completo明道大學
材料科學與工程學系碩士班
100
This thesis is to study the process and properties of the TiAlBN multilayer by using the unbalanced magnetron sputtering system. The content of this study is focused on the microstructure, mechanical properties and its potential application. Two different sputtering systems, home-made and Leybold 600SP were compared with TiAlBN coatings. The process were divided into three sessions, including the synthesis of TiAlB multilayer coatings, which were conducted with the variation of AlB2 magnetron power of 300W, 400W, 500W. The second session is the process with introduction of N2 gas, which leads to TiAlBN multilayer coatings. The third session is carried out by following the second session with extra introduction of C2H2 gas on top formed as TiAlBCN coatings. The Al33B67 and Ti circular targets were face to face installed in the chamber. Microstructures of the studied coatings were examined by XRD for the crystal preferred orientation, SEM for surface morphology and the fractured sections, ESCA for element binding configuration, and AFM. The mechanical properties was investigated by using Rockwell indentation to determine the adhesion, nanoindenter testing for the hardness, the wear test of grinding tungsten steel balls and glass balls. The results show that with increasing magnetron power density contributes to the increase of film thickness. TiAlB and TiAlBN exhibits the low Ra value. Introduction of N2 and C2H2 gases, respectively, leads to the decrease of film hardness, but improve the tribological behaviors.
Kuo, Ching-Ying y 郭鑑瑩. "High-Temperature Oxidation Properties of Unbalanced magnetron PVD coating TiAlCN film on High Speed Tool Steel". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/49086311574956280393.
Texto completo國立高雄第一科技大學
機械與自動化工程所
91
Most 3C industry in operation has to meet high precision, high speed and fine dimension demand, the traditional existed cutting tool has it’s limitation . Especially when we processing the P.C. board, the cooling oil is prohibited in order to prevent of creating pollution problem. Therefore cutting tool is easily worn out in this high speed cutting and no cooling oil environment due to temperature increased, which will cost the production cost increase rapidly. In order to meet this requirement, this paper will develop a coated film-TiAlCN which produced by combining two different coated film of TiCN which have high hardness and low friction coefficient, and TiAlN which have high oxidation resistance ability. In this research, we used unbalanced magnetron physical sputtering equipment to sputter TiAlCN coating film on high speed tool steel. We will study the characteristics of TiAlCN coating film to put in use on high temperature process environment. As the result of this experiment, we can found out the oxidation resistance temperature of TiAlCN coating film exhibited onset of 800℃. When the temperature approach 900℃, TiAlCN coating film will not have any protection properties for base material. After that, the base material will oxidation faster, and develop Fe2O3 structure. Beside that, by XRD and EDS analysis, we can found out that because of the carbon element became oxidation easily inside the TiAlCN coating film in the high temperature environment, the hardness and wear resistance will became lower. Until the temperature approach 500℃, it will grown a very thin oxidation film(Al2O3)in the TiAlCN coating film surface. The Al2O3 film has high hardness and high dense structure which coated further avoid oxidation in the inner structure of TiAlCN, and increase the hardness and wear resistance of the TiAlCN in the high temperature environment. Therefore, metastable phase(111)and (200)texture of TiAlCN will transition to (TiN/TiCN/TiAlN/TiAlCN)metastable phase. Finally, we also will discussion the other characteristics such as hardness、adhesive strength、wear resistance and color of the surface of TiAlCN coated film in this paper.
Jao, J. Y. y 饒瑞昀. "Study on the Properties of TiAl-doped DLC Multilayer Coatings Synthesized by Cathodic Arc Evaporation". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/37369747305555125544.
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材料暨系統工程研究所
93
Abstract In this work, the combinations of metal-doped DLC and TiAlN/TiN double-layered films were designed to deposit on the tool steels using cathodic arc evaporation in a single process. The economic advantage in depositing the combined coating in one production scale PVD coating system is of practical importance. The TiAl-doped DLC as lubricant coatings were synthesized with TiAl-target arc sources to emit ion plasma to activate acetylene reactive gases. Experiments were carried out to deposit TiAl-DLC on TiAlN/TiN/M2 tool steel for different substrate bias ranging from -50 to -200 V, hydrocarbon gases (C2H2) pressure 10 to 25 mtorr and temperature fixed at 180 ℃. Scanning electron microscopy (SEM), Auger electron spectroscopy (AES), micro-Raman spectroscopy. X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) techniques were employed to analysis the microstructure properties of TiAl-doped DLC coatings. Vicker's and tribometer tester were used to measure the mechanical properties of TiAl-doped DLC coatings. The results indicated that the bias voltage and hydrocarbon gases (C2H2) pressure plays a major role in the microstructure change in the deposition of TiAl-doped DLC films. The profile ID/IG and sp3/sp2 ratio corresponds to the change of microhardness profile as the bias voltage or the hydrocarbon gases (C2H2) pressure varied. And, TiAl metals are in the form of small nanocrystallites of pure metal or metal carbides dispersed throughout the carbon network. The tribo-analysis indicated that the coatings exhibited steady-state friction in the range of 0.15 - 0.25 to the end of 2 km travel distance. Interesting optimum wear rate corresponded to the steady-state low coefficient of friction of DLC films due to formation of graphitized layer. The lubricity and wear resistance of TiAl-doped DLC coatings is then demonstrated to potentially be applied to the cutting tools with no lubricants. To summary, the optimum condition and properties of TiAl-doped DLC coatings was appeared at the bias of-120 V and the hydrocarbon gases (C2H2) pressure of 15 mtorr.
Straubel, Ariane. "Gefüge-Eigenschaftsbeziehung einer TiAl-Legierung mit Oxidationsschutz und Wärmedämmschicht". Doctoral thesis, 2016. https://tud.qucosa.de/id/qucosa%3A30304.
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