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Al2O3-TiCN/Co-Ni复合材料制备及力学性能

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单位:1.?沈阳化工大学材料科学与工程学院?沈阳市先进陶瓷制备技术及应用重点实验室?沈阳?110142??2.?沈阳理工大学材料科学与工程学院?沈阳?110168?3.?东北大学材料与冶金学院?沈阳?110004?
关键词:氧化铝-碳氮化钛/钴-镍?复合陶瓷?真空热压烧结?显微组织?力学性能?
分类号:TB333; TG 76
出版年,卷(期):页码:2015,43(7):0-0
DOI:10.14062/j.issn.0454-5648.2015.07.21
摘要:

?用真空热压烧结法制备了Al2O3-TiC0.5N0.5/Co-Ni复合材料,用扫描电子显微镜、能谱仪、电子万能试验机和Vickers硬度仪等测试分析了不同烧结参数对样品显微组织及力学性能的影响。结果表明:当烧结温度1 650 ,压力25 MPa,保温时间30 min时,样品的相对密度、抗弯强度(σmax)、断裂韧性(KICmax)Vickers硬度(HV)的最大值分别达到99.6%σmax=1 100 MPaKICmax=10.5 MPa?m1/2HV=23.7 GPa样品断口形貌存在混晶断裂特征。

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?The Al2O3-TiC0.5N0.5/Co-Ni composite ceramic material was prepared by a powder metallurgy vacuum hot-pressing sintering method. The influence of the sintering parameters on the microstructure and mechanical properties was investigated by scanning electron microscope, energy dispersive spectrometer, electronic universal tester and Vickers hardness tester, respectively. The results show that the maximum relative density, the maximum flexural strength (σmax), the fracture toughness (KICmax) and the Vickers hardness (HV) of the material prepared at the sintering temperature of 1 650 , the pressure of 25 MPa and the heat treatment time of 30 min are 99.6%, 1 100 MPa, 10.5 MPa?m1/2 and 23.7 GPa, respectively, and the fracture characteristic of the material is the mixed crystal fracture characteristic.

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基金项目:
国家自然科学基金项目(51274143);沈阳市先进陶瓷制备技 术及应用重点实验室建设项目(F12-259-1-00)资助。
作者简介:
第一作者:纪连永(1989—),男,硕士研究生。 通信作者:马伟民(1956—),博士,教授。
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