Dissertation > Excellent graduate degree dissertation topics show

The Fabrication and Properties of Titanium Aluminum Nitride Coatings

Author: YangShuYu
Tutor: ZhangChunHua
School: Shenyang University of Technology
Course: Materials Science
Keywords: Multi-arc Plating TiAlN Coatings Cohesions Wear
CLC: TG174.44
Type: Master's thesis
Year: 2007
Downloads: 137
Quote: 0
Read: Download Dissertation

Abstract


As one of the physical vapor deposition method, multi-arc plating process can be especially used to prepare metallic compound coatings or metal coatings with high melting point on metal surface. It has been on rushing developed since 1980’s and become one of the most advanced plating techniques at present. TiAlN coatings have high hardness. Its performances are better than TiN coatings.TiAlN coatings are deposited by multi-arc plating process on Ti and Ti6A14V alloy. Scanning electron microscopy (SEM), EDAX and X-ray diffraction (XRD) are used to investigate the composition, microstructure, components and phases of coatings. Film-substrate hardness ratio of the system is measured with auto micro-hardness tester. Bond strength of film-substrates is measured by scratch tests. Skimming wear and inching wear mechanics are also investigated. The effect of bias voltage on TiAlN microstructure and properties were studied. The results show that TiAlN coatings have been made in different parameters by varying bias voltage. Droplets density was reduced while holes density was increased with the bias voltage rising. Varying bias voltage has little effects on composition of TiAlN coatings. Both bias voltage and substrate lead to preferred orientations much more different in phases of coatings. At bias voltage of -600V and -450V, the coatings on Ti6A14V alloy have higher (110) preferred orientation, while at bias voltage of -100V, the coatings on Ti6A14V alloy have higher (106) and (102) preferred orientation. All of the coatings on Ti have higher (110) preferred orientations. The micro-hardness of TiAlN coatings is HV1935. Film-substrate hardness ratio of the system has been accounted. The result shows that at bias voltage of -450V, the coatings and Ti6A14V alloy have better capability of coordinate deformation while coatings and Ti have better capability of coordinate deformation at bias voltage of-100V. TiAlN coatings and substrates bond strengths are measured by scratch test. At bias voltage of—450V, the coatings on Ti6A14V alloy have better bond strength and the critical load L_c is 56.25N while coatings on Ti surface have better bond strength at -100V bias voltage and the critical load L_c is 62.5N. Wear test showed that the friction coefficient and the wear volume of TiAIN coatings are lower than those of Ti6A14V alloy and Ti. Thus the wear resistance of TiAIN coatings was significantly better than substrates.

Related Dissertations

  1. Reactive Hot-Pressing and Mechanical Properties of （ZrB2-ZrO2）/BN Composites,TB332
  2. Optimizition of Compositions and Processing Parameters and Wear Properties of Cemented Carbides YG11R Modified by Nanosized Rare Earth,TG135.5
  3. EDM Electrode Wear Mechanism and Control Research,TG661
  4. Analysis of Flexspline Stress and Tooth Wear in Harmonic Gear Drive,TH132.43
  5. Research and Development of Wear Resistance for Physically Disabled Men Jackets,TS941.2
  6. Study on Technics & Performance of Nano Electroless Composite Plating on 20~# Steel,TQ153
  7. Study of Androgynous Design in Modern Men’s Wear,TS941.2
  8. Preperation of Low Friction and Wear Resistant High-Purity Alumina Ceramic,TQ174.1
  9. On-line Monitoring of Tool Wear for Mass Production,TG71
  10. Development of High-performance Modified Asphalt Emulision for Ultra-thin Wearing Course Interlayer Bonding Materials,U414
  11. Research on Cutting Tool Wear Detection Based on Computer Vision,TP274
  12. Hypereutectic high chromium cast iron pieces of quality and its impact extrusion abrasive wear performance analysis,TG376
  13. Experimental Study of Tool Wear in Diamond Cutting of Optical Glass,TG711
  14. Tribological Properties and Corrosion Resistance to Molten Steel of （ZrB2-ZrO2）/BN Composites,TB332
  15. Bisphosphonates for artificial joints wear particles stimulate osteoclast differentiation Formation,R687.4
  16. The Diversification Strategy Research of Adult Apparel Enterprise,F426.86
  17. The Design of Tool Wear Compensation System Based on Piezoelectric Actuator,TG71
  18. Simulation Study on Formation Mechanism and Wheel Wear of Superhigh-point Grinding,TG596
  19. Post-Project Evaluation of HDPE Lined Anti-Wear Anti-Corrosion Tubing,F426.22
  20. A Study on Processes and Properties of Using Yunnan Local Pig Iron to Produce Compacted Graphite Iron,TG255
  21. Copper surface metal clips embedded ceramic composite coating technology research,TG174.44

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Corrosion control and protection > Metal surface protection technology > Metal complex layer of protection
© 2012 www.DissertationTopic.Net  Mobile