Microstructure and Properties of Al2O3/TiC/Mo/Ni Micro-nano-ceramic Composite
摘 要
采用真空热压烧结技术制备了纳米TiC体积分数为3%~5%的Al2O3/TiC/Mo/Ni微纳陶瓷复合材料, 并对其力学性能、相对密度、微观结构和三点弯曲断口形貌进行了研究。结果表明: 微纳陶瓷复合材料中存在非典型的灰芯/白环结构; 复合材料的断裂方式为穿晶断裂和沿晶断裂的混合形式; 添加的纳米粒子分布于Al2O3基体晶粒的内部与晶界, 形成了晶内/晶界型结构, 细化了晶粒, 强化了晶界, 提高了复合材料的强度和相对密度, 其抗弯强度、断裂韧度、硬度和相对密度分别为970 MPa, 5.5 MPa·m1/2, 20.4 GPa和99.5%。
Abstract
Al2O3/TiC/Mo/Ni micro-nano-ceramic composite with 3 vol.%-5 vol.% of nano-sized TiC particles was fabricated by hot-pressed sintering in vacuum. The mechanical properties, relative density, microstructure and three-point-bending fracture surface morphology of the composite were studied. Results show that there was a non-typical structure of gray core/white rim in the microstructure of the composite. The composite fractured as a mixing mode of intergranular fracture and transgranular fracture. As the added nano-sized TiC particles dispersed in the boundaries or inside of the grains of the Al2O3 matrix, intragranular and intergranular structures formed, grains were refined, and the grain boundaries were strengthened, thus the strength and relative density of the composite improved. The bending strength, fracture toughness, Vichers hardness and relative density were 970 MPa, 5.5 MPa·m1/2, 20.5 GPa and 99.5%, respectively.
中图分类号 TQ174
所属栏目 纳米材料
基金项目 国家重点基础研究发展计划(973计划)项目(2009CB724402); 山东省优秀中青年科学家考研奖励基金资助项目(BS2011ZZ010)
收稿日期 2013/3/27
修改稿日期 2013/12/13
网络出版日期
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备注刘维民(1970-), 男, 山东沂水人, 讲师, 博士。
引用该论文: LIU Wei-min,AI Xing,ZHAO Jun,ZHOU Yong-hui. Microstructure and Properties of Al2O3/TiC/Mo/Ni Micro-nano-ceramic Composite[J]. Materials for mechancial engineering, 2014, 38(3): 35~38
刘维民,艾兴,赵军,周咏辉. Al2O3/TiC/Mo/Ni微纳陶瓷复合材料的微观结构与性能[J]. 机械工程材料, 2014, 38(3): 35~38
被引情况:
【1】高建红,李文辉,刘伦伦,王海龙,侯朋坤, "钛合金和镍合金加工用新型刀具材料的研究进展",机械工程材料 38, 1-5(2014)
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参考文献
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【2】郭景坤.关于先进结构陶瓷的研究[J].无机材料学报, 1999, 14(2): 193-202.
【3】杨学锋, 邓建新, 姚淑卿.Al2O3/TiC复合陶瓷拉丝模材料的摩擦磨损性能[J].硅酸盐学报, 2005, 33(12): 1522-1526.
【4】ZHAO Jun, YUAN Xun-liang, ZHOU Yong-hui. Processing and characterization of an Al2O3/WC/TiC micro- nano-composite ceramic tool material [J].Materials Science and Engineering: A, 2010, 527: 1844-1849.
【5】KRELL A, KLAFFKE D. Effects of grain size and humidity on fretting wear in fine-grained alumina Al2O3/TiC and zirconia [J]. Journal of the American Ceramic Society, 1996, 79(5): 1139-1146.
【6】NIIHARA K. New design concept of structural ceramics-ceramic nanocomposites[J].Journal of the Ceramic Society of Japan, 1991, 99(10): 974-982.
【7】LIU N, XUA Y D, LI H, et al. Effect of nano-micro TiN addition on the microstructure and mechanical properties of TiC based cermets [J].Journal of the European Ceramic Society, 2002, 22(13): 2409-2414.
【8】WANG Jun, LIU Ying, ZHANG Ping, et al. Effect of VC and nano-TiC addition on the microstructure and properties of micrometer grade Ti(CN)-based cermets [J].Materials and Design, 2009, 30(6): 2222-2226.
【9】吕志杰, 艾兴, 赵军, 等.Si3N4/TiC纳米复合陶瓷材料显微结构[J].山东大学学报, 2005, 35(1): 13-16.
【10】王兴庆, 贺小祥, 郭海亮.Mo对TiC基金属陶瓷组织和性能的影响[J].粉末冶金材料科学与工程, 2008, 13(5): 274-277.
【11】YOSHIMURA H, SUGIZAWA T, NISHIGAKI K, et al. The reaction occurring during sintering and the characteristics of TiC-20 TiN-15 WC-10 TaC-9 Mo-5.5 Ni-11 Co cermet [J].International Journal of Refractory & Hard Metals, 1983, 2(4): 170-174.
【12】CHUN D, KIM D Y, EUN K Y. Microstructural evolution during the sintering of TiC-Mo-Ni Cermets [J].Journal of the American Ceramic Society, 1993, 76(8): 2049-2052.
【13】张国军, 金宗哲.颗粒增韧陶瓷的增韧机理[J].硅酸盐学报, 1994, 22(3): 259-269.
【14】仝建峰, 陈大明, 陈宇航.纳米SiC-Al2O3/TiC多相陶瓷复合材料显微结构的研究[J].硅酸盐学报, 2001, 29(5): 427-430.
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