Microstructure and Hardness of Ni-Cr Porous Preform Reinforced Al-Based Composites by Low Infiltration Method

Abstract:

With the rapid development of aerospace and automobile industries, metal matrix composites (MMCs) have attracted much attention because of its excellent performance. In this paper, Ni-Cr/AC8A composites reinforced with porous Ni-Cr preform were manufactured by low pressure infiltration process, infiltration temperatures are 700oC~850oC. The microstructure and phase composition of composites were evaluated using optical microscope, X-ray diffraction (XRD) and electro-probe microanalysis (EPMA), It's found that they're intermetallic compounds generated in the composites. Recently, intermetallic compounds have attracted much attention as high-temperature material. We study the hardness of Ni-Cr/AC8A composites, the results show the Ni-Cr/AC8A composite has high hardness due to the intermetallic compounds exist.

• Periodical: Advanced Materials Research (Volume 275)
• Pages: 251-254
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.275.251
• Online since: July 2011
• Authors: Hua Wei Rong, Cheol Hong Park, Won Jo Park, Han Ki Yoon
• Keywords: Intermetallic Compound (IMC), Metal Matrix Composite (MMC), Microstructure, Ni-Cr Porous Preform, Vicker-Hardness

References

[1] K. Morsi, Reaction synthesis processing of Ni–Al intermetallic materials, Material Science Engineering A 299 (2001), p.1–15.

DOI: 10.1016/s0921-5093(00)01407-6

[2] C.T. Liu, Recent advances in ordered intermetallics, Materials Chemistry and Physics 42(1995), p.77–86.

[3] Bin Wen, Jijun Zhao, Fudong Bai, Tingju Li, First-principle studies of Al–Ru intermetallic compounds, Intermetallics 16(2) (2008) , p.333–339.

DOI: 10.1016/j.intermet.2007.11.003

[4] Yao Junping et al. Dry friction and wear properties of aluminum matrix composites reinforced with 3D-network ceramics. The Chinese Journal of Nonferrous Metals, 2004, Vol. 14 No. 5 , pp.766-770.

[5] Wittry, David B. (1958). Electron Probe Microanalyzer, US Patent No2916621, Washington, DC, U.S. Patent and Trademark Office.