Combustion Synthesis and Densification of Cr-Al(Cr)2O3 Cermets
PAN Ye; ZHANG Chuan; ZHANG Yancheng; SUN Guoxiong
Department of Materials Science and Engineering; Southeast University; Nanjing 210096
Cite this article:
PAN Ye; ZHANG Chuan; ZHANG Yancheng; SUN Guoxiong. Combustion Synthesis and Densification of Cr-Al(Cr)2O3 Cermets. Acta Metall Sin, 2005, 41(7): 733-737 .
Abstract Cr--Al(Cr)2O3 cermets have been successfully produced by
combustion synthesis, through changing the composition of reaction system
and controlling the solidification process. The microstructures of the
cermets were characterized by dispersive sub--micron scale Cr particles
in ceramic matrix. The effects of polymer addition and system composition
on the microstructure of the cermets and combustion synthesis procedure were
investigated. The results show
that the igniting temperature and time of Al--Cr2O3--Al2O3
system decrease evidently with polymer addition. Also, the polymer addition
could make Cr particles more uniformly distribute in the ceramic matrix. By
adding the diluent Al2O3 and excessive Cr2O3, the size
of Cr particles could be decreased, and the matrix of the cermets are
changed from pure Al2O3 to Al2O3 and (Al, Cr)2O3
mixture. The densification of Cr--Al(Cr)2O3 cermets is achieved
by applying a lower pressure on the synthesized melt.
[1] Fahrenholtz W G, Ellerby D T, Loehman R E. J Am Ceram Soc, 2000; 83: 1279 [2] Ji Y, Yeomans J A. J Eur Ceram Soc, 2002; 22: 1927 [3] Xu Y D, Liu N, Zeng Q M, Li H, Shi M. Acta Mater Compos Sin, 2003; 20(1): 33 (许育东,刘宁,曾庆梅,李华,石敏．复合材料学报, 2003;20(1):33) [4] Leverkoehne M, Murthy V S R, Janssen R. J Eur Ceram Soc, 2002; 22: 2149 [5] Hussain S, Barbariol I, Roitti S. J Eur Ceram Soc, 2003; 23: 315 [6] Zhang Y C, Pan Y, Zhang C. Eng Sci, 2004; 6(6): 63 (张衍诚,潘冶,张传．中国工程科学, 2004;6(6):63) [7] Pan Y, Zhang C, Sun G X. Spec Cast Nonferrous Alloys, 2004; (3): 4 (潘冶,张传,孙国雄．特种铸造及有色合金, 2004;(3): 4)
XIONG Weihao;HU Zhenhua;CUI Kun(State Key;Laboratory;of Dies Technology;Huazhong University of Science and Technology;Wuhan 430074)(State Key Laboratory of Dies Technology;Huazhong University of Science and Technology;Wuhan 430074)(Manuscript received 1996-04-26). TRANSITIONAL LAYER OF PHASE INTERFACES IN Ti(C,N)-BASED CERMET[J]. 金属学报, 1996, 32(10): 1075-1080.
