AI 5083//10 wt% SiCp nano composites have been synthesized by means of high energy ball milling followed by spark plasma sintering (SPS). Nano composites produced via this method exhibited near-theoretical density while retaining the nano-grained features. X-ray diffraction (XRD) analysis indicated that the crystalline size of the ball milled AI 5083 matrix was observed to be~25 nm and it was coarsened up to~30 nm after SPS. Nano indentation results of nano composites demonstrated a high hardness of~280 HV with an elastic modulus of 126 GPa. Wear and friction characteristics with addition of SiCp reinforcement exhibited significant improvement in terms of coefficient of friction and specific wear rate to that of nano structured AI 5083 alloy. The reduction in specific wear rate in the nanocomposite was mainly due to the change of wear mechanism from adhesive to abrasive wear with the addition of SiCp which resulted in high hardness associated with nano-grained microstructure.
参考文献
| [1] | C. Cayron;P. A. Buffat .About the epitaxial growth of Mg-subgrains on Al2MgC2 interfacial carbides in a squeeze cast Mg-4Al/T300 metal matrix composite[J].Journal of Materials Science Letters,1999(20):1671-1674. |
| [2] | W.C. Oliver;G.M. Pharr .Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology[J].Journal of Materials Research,2004(1):3-20. |
| [3] | A. Alizadeh;E. Taheri-Nassaj .Wear Behavior of Nanostructured Al and Al-B_4C Nanocomposites Produced by Mechanical Milling and Hot Extrusion[J].Tribology letters,2011(1):59-66. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%