Microstructural and Mechanical Characteristics of in Situ Synthesized Chromium-Nickel-Graphite Composites


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Cr-C-Ni composites were synthesized in situ from elemental powders of Cr, Ni and C by high energy milling followed by reactive sintering. The milled powders with the grain size in nano-scale were pressed to compacts and sintered. During the thermal treatment that was performed after the pressing the chromium carbide was formed first and then the Cr3C2-Ni cermets were sintered in one cycle. The interface between the binder phase and the carbide grains of the in situ composite has a good bonding strength as it is not contaminated with oxidation films or other detrimental surface reactions. The microstructure of such cermets is fine-grained and more homogeneous than that of cermets produced by conventional method. As a result the cermets have higher hardness, transverse rupture strength and 1.2-2 times higher wear and erosion resistance.



Materials Science Forum (Volumes 534-536)

Edited by:

Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim




J. Pirso et al., "Microstructural and Mechanical Characteristics of in Situ Synthesized Chromium-Nickel-Graphite Composites ", Materials Science Forum, Vols. 534-536, pp. 1209-1212, 2007

Online since:

January 2007




[1] V.G. Kayuk, V.A. Masljuk, A.D. Kostenko: Powder Metallurgy and Metal Ceramics, 42 (2003) p.257.

[2] I. Hussainova, J. Pirso, M. Viljus, in: Proc. of World Congress on Powder Metallurgy and Particulate Materials. USA. Metal Powder Industry Federation. 2002, N6, p.166.

[3] J. Pirso, M. Viljus, in: Proc. of 2000 Powder Metallurgy World Congress, Kioto Part 2. p.1265.

[4] Wear Resistance Assurance: gas-abrasive wear testing of materials and coatings with centrifugal accelerator, GOST23. 201-78, Publishing House of Standards, Moscow, (1978).

[5] J. Pirso, M. Viljus, S. Letunovits: Wear 257 (2004) p.257.

DOI: https://doi.org/10.1016/j.wear.2003.12.014

[6] ASTM Standard B611. Standard test method for abrasive wear resistance of cemented carbide. Annual book of ASTM standards, 02. 05. Philadelphia: ASTM; 1999. 328-329.

[7] J.F. Archard, in: Wear Control Handbook, American Society of Mechanical Engineers, New York, 1980, 35-80.