反应熔渗烧结法制备Ti3SiC2材料及其抗弯强度
Preparation of Ti3SiC2 Material by Reactive Melt Infiltration Sintering and Its Flexural Strength
摘 要
以钛、TiC、硅粉为原料, 采用反应熔渗烧结法制备了Ti3SiC2材料, 并对其抗弯强度及断口形貌进行了分析。结果表明:将物质的量比为1∶2∶0.2的钛、TiC、硅粉混合后, 在1 500 ℃烧结0.5 h, 能够制备出高纯致密的Ti3SiC2材料, Ti3SiC2的纯度高达97.6%, 孔隙率仅为4.6%; 随着Ti3SiC2材料纯度的增加, 材料的抗弯强度明显提高, 当Ti3SiC2材料的纯度为97.3%时, 其抗弯强度达到252.5 MPa; 断口可见大量层状Ti3SiC2颗粒, 颗粒间无明显的界面。
反应熔渗烧结
孔隙率
抗弯强度
titanium silicon carbide
reactive melt infiltration sintering
porosity
flexural strength
Abstract
Using Ti, TiC and Si powders as raw materials, Ti3SiC2 material was prepared by reactive melt infiltration sintering process. The flexural strength and fracture morphology of the material were analyzed. The results show that highly pure and compact Ti3SiC2 material, whose Ti3SiC2 purity and porosity were 97.6% and 4.6% respectively, could be obtained with the molar ratio of 1∶2∶0.2 (Ti, TiC and Si powders) after sintering at 1 500 ℃ for 0.5 h. With increase of the Ti3SiC2 content, the flexural strength increased obviously, when purity of Ti3SiC2 material was 97.3%, the flexural strength could reach 252.5 MPa. A lot of layered Ti3SiC2 particles on the fracture, and there was no obvious interface between particles.
中图分类号 TF124
所属栏目
基金项目 陕西省自然科学基金资助项目(2007E104); 陕西省重点学科建设专项基金资助项目(陕财办交[2008]171号)
收稿日期 2010/11/21
修改稿日期 2011/7/28
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备注吕振林(1962-), 男, 陕西西安人, 教授, 博士。
引用该论文: LV Zhen-lin,LI Yang,XIAO Qi-dan. Preparation of Ti3SiC2 Material by Reactive Melt Infiltration Sintering and Its Flexural Strength[J]. Materials for mechancial engineering, 2011, 35(11): 62～65
吕振林,李阳,肖琪聃. 反应熔渗烧结法制备Ti3SiC2材料及其抗弯强度[J]. 机械工程材料, 2011, 35(11): 62～65
被引情况:
【1】严汉兵,许剑光,吴海江,颜建辉,陈晓宇,陈肯, "铝对高温自蔓延合成Ti3SiC2粉体的影响",机械工程材料 39, 46-48(2015)
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参考文献
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【11】TANG Ke, WANG Chang-an. A study on the reaction mechanism and growth of Ti3SiC2 synthesized by hot-pressing[J]. Materials Science and Engineering,2002,328:206-212.
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