摘要
热压烧结制备了Al2O3/Cr3C2/(W,Ti)C复合陶瓷材料,对其抗弯强度及组织形貌进行了研究,分析了Cr3C2与(W,Ti)C对抗弯强度的影响。结果表明:添加(W,Ti)C与Cr3C2有利于阻止晶界迁移,延缓晶粒长大,提高材料强度,但每一相的添加量以10%内为宜,两者添加总量在20%左右时Al2O3/Cr3C2/(W,Ti)C复合材料抗弯强度较佳。铬、钨、钛离子在Al2O3基体晶粒中的固溶起强化作用,网状结构是降低材料抗弯强度的重要原因。
Ceramic composites Al2O3/Cr3C2/（W, Ti）C with different contents of Cr3C2 and （W, Ti）C particles were fabricated with hot-pressing technique at 1 700 ℃ under 28 MPa pressure for 30 min in N2 atmosphere. The effects of Cr3C2, （W, Ti）C on the flexural strength and microstructure of Al2O3/Cr3C2/（W,Ti）C ceramic composites were investigated. Cr3C2 and （W, Ti）C could retard the migration of grain boundaries and suppress the grain growth. A suitable content of Cr3C2 or （W,Ti）C was about 10%, and the total suitable content was about 20%. The solid solution of elements Cr, W and Ti in Al2O3 grains strengthened the matrix, but the net microstructure decreased the flexural strength seriously.
出处
《机械工程材料》
CAS
CSCD
北大核心
2005年第8期43-45,共3页
Materials For Mechanical Engineering
基金
山东省自然科学基金资助项目(Y2001F02)
山东省优秀中青年科学家科研奖励基金资助项目(2000-49)
