采用超重力下燃烧合成工艺,以快速凝固方式制备出TiB2系列含量的TiC-TiB2细晶复合陶瓷.XRD、FESEM与EDS分析表明随TiB2含量的增加,TiC-TiB2复合陶瓷基体逐渐从TiC微米球品组织逐渐转化为TiB2小尺寸片晶组织,且对于TiC-50%(摩尔分数)TiB2复合陶瓷,可获得TiB2小尺寸片晶均匀镶嵌于TiC基体上的共晶组织.力学性能测试结果表明,TiC-50% TiB2因在凝固过程中发生共品反应,陶瓷相对密度和硬度均达到最高值(分别为98.6%与18.4GPa),并且因TiB2小尺寸片晶在裂纹扩展时所诱发的裂纹偏转、桥接及片晶拔出增韧机制的协同作用所致,TiC-66.7 %TiB2具有最高的断裂韧性,13.4MPa·m1/2.
参考文献
[1] | 江东亮;李龙土;欧阳世翕.无机非金属材料工程,中国材料工程大典[M].北京:化学工业出版社,2006:1-8. |
[2] | D. Vallauri;I.C.Atias Adrian;A. Chrysanthou .TiC-TiB_2 composites: A review of phase relationships, processing and properties[J].Journal of the European Ceramic Society,2008(8):1697-1713. |
[3] | SWAIN M V;郭景坤.陶瓷的结构与性能[M].北京:科学出版社,1998:153-233. |
[4] | Zhongmin Zhao;Long Zhang;Yigang Song .Microstructures and properties of large bulk solidified TiC-TiB_2 composites prepared by combustion synthesis under high gravity[J].Scripta materialia,2009(3):281-284. |
[5] | 潘传增,张龙,赵忠民,曲振生,杨权.超重力下燃烧合成TiB_2-TiC共晶复合陶瓷[J].复合材料学报,2010(01):109-117. |
[6] | Binglin Zou;Ping Shen;Zhongming Gao .Combustion synthesis of TiC_x-TiB_2 composites with hypoeutectic, eutectic and hypereutectic microstructures[J].Journal of the European Ceramic Society,2008(11):2275-2279. |
[7] | 宋桂明,杨跃平,王玉,周玉,雷廷权.TiC颗粒增强钨基复合材料的组织结构与力学性能[J].有色金属,2000(01):78-82. |
[8] | 梁基谢夫.金属二元系相图手册[M].北京:化学工业出版社:475. |
[9] | GUSEV A I .Phase equilibria in the ternary system titanium-boton-carbon:the sections TiCy-TiB2 and B4Cy-TiB2[J].Journal of Solid State Chemistry,1997,133:205-210. |
[10] | HOLLECK H;LEISTE H;SCHNEIDER W .Significance of phase boundaries in wear resistant TiC/TiB2 materials.Part 1:Investigations with transmission electron microscopy[J].International Journal of Refractory Metals and Hard Materials,1987,6(03):149-154. |
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