Abstract Cr-Al(Cr)2O3 cermets with relative density of about 90% have been successfully produced by thermo-explosive combustion synthesis and pressure on the melt. Cr particles are well-distributed in ceramic plates or boundary between ceramic plates. The size of Cr particles is as small as 200nm. The tribological properties of the cermets were investigated. The results show that the cermets have good wear resistance property under dry sliding. The wear volume of samples is related to addition amount of diluents Al2O3 and excessive Cr2O3. Through rational balance of them, the wear volume of Cr-Al(Cr)2O3 is lower than that of powder sintered alumina ceramic. The main wear mechanism of the cermets is the peeling off under dry sliding. After oil lubrication, there is little wear volume loss in the sample under loading of 147N and 6000m sliding distance. The wear volume of the cermet is increased with loading, but is smaller a order of magnitude than that of Cr12MoV steel.
[1] Li R J. Ceramic-Metal Composites. Beijing: Metallurgical Industry Press, 2004: 20, 118 (李荣久．陶瓷-金属复合材料．北京:冶金工业出版社,2004; 20,118) [2] Li G J, Huang X X, Guo J K. Mater Rev, 2000; 14(9): 22 (李国军,黄校先,郭景坤．材料导报,2000;14(9):22) [3] Ji Y, Yeomans J A. J Eur Ceram Soc, 2002; 22: 1927 [4] Oh S T, Sekino T, Niihara K. J Eur Ceram Soc, 1998; 18: 31 [5] Sekino T, Nakajima T, Ueda S. J Am Ceram Soc, 1997; 80: 1139 [6] Mao D S, Guo S Y, Li J. Rare Metal Mater Eng, 1997; 26(5): 23 (茅东升,郭绍义,郦剑．稀有金属材料与工程,1997;26(5): 23) [7] Pan Y, Zhang C, Zhang Y C, Sun G X. Acta Metall Sin, 2005; 41: 733 (潘冶,张传,张衍城,孙国雄．金属学报,2005;41:733) [8] Zeng J. Cemented Carbid, 2004; 21(2): 89 (曾杰．硬质合金,2004;21(2):89) [9] Zhang Y C. Master Thesis, Southeast University, Nanjing, 2005 (张衍诚．东南大学硕士学位论文,南京,2005)
