反应熔渗法制备Ti_3SiC_2的工艺及相转变规律研究
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- 论文作者：刘会 ; 万红
- 年：2016
- 作者机构：国防科学技术大学;
- 论文关键词：三元层状 ; 反应熔渗 ; 热力学 ; 相图
- 会议召开时间：2016-08-17
- 会议录名称：中国航天第三专业信息网第三十七届技术交流会暨第一届空天动力联合会议论文集
- 语种：中文
- 分类号：TQ174.1
- 学会代码：HTDZ
- 会议名称：中国航天第三专业信息网第三十七届技术交流会暨第一届空天动力联合会议
- 会议地点：中国陕西西安
- 主办单位：中国航天第三专业信息网、中国航天科技集团公司科技委、中国航天科工集团公司科技委
- 学会名称：中国航天第三专业信息网
- 页数：6
- 文件大小：463k
- 原文格式：D
- 会议级别：全国
摘要
三元层状碳化物Ti_3SiC_2,其结构属于六方晶系,兼具金属和陶瓷的特性,具有很多优良性能。本文以Ti粉、Si粉及活性炭粉为原料,在1450℃~1550℃反应熔渗烧结制备了Ti_3SiC_2陶瓷材料,并结合Pandat热力学相图分析软件和熔渗后试样的XRD及SEM分析结果,对反应熔渗过程中相转变规律进行了研究。结果表明:反应熔渗制备Ti_3SiC_2的最佳熔渗温度为1500℃,Si熔渗前,预制体烧结过程中形成液相有利于样品的烧结致密化;预制体中Si含量的增加,Ti_3SiC_2相含量增加;反应熔渗过程中,Si的增多,使得Ti-Si-C吉布斯自由能降低,且预制体中液相量增多,促进了Ti C参与反应的程度,使三元产物Ti_3SiC_2相的比例提高。
引文
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[3]Sun Zhimei,Zhang Yi,Zhou Yanchun.SYNTHESIS OF Ti3Si C2 POWDERS BY A SOLID-LIQUID REACTION PROCESS,Scripta Materialia,Vol.41,No.1,61-66,1999.
[4]Fanai Meng,Baoyan Liang,Mingzhi Wang.Investigation of formation mechanism of Ti3Si C2 by self-propagating high-temperature synthesis,Int.Journal of Refractory Metals and Hard Materials,Vol.41,152-161,2013.
[5]B.Y.Liang,M.Z.Wang,J.F.Sun,etal.Synthesis of Ti3Si C2 in air using mechanically activated 3Ti/Si/2C powder,Journal of Alloys and Compounds,Vol.474,L18-L21,2009.
[6]Xue Guo,Junxia,Shiyuan Yang,etal.Preperation of Ti3Si C2 powders by the molten salt method,Materials Letters,Vol.111,211-213,2013.
[7]朱教群,梅炳初,陈艳林.三元层状碳化物Ti3Si C2的研究进展,材料科学与工程,Vol.19,No.4,105-109,2001.
[8]Luo Yong-Ming,Pan Wei,Li Shuqin,etal.Synthesis and mechanical properties of in-situ hot-pressed Ti3Si C2 polycrystals,Ceramics International,Vol.28,227-230,2002.
[9]Qiong Wu,Changsheng Li,Hua Tang.Surface characterization and growth mechanism of laminated Ti3Si C2 crystals fabricated by hot isostatic pressing,Applied Surface Science,Vol.256,6986-6990,2010.
[10]Sung Sic Hwanga,Jae Ho Han,Dongyun Leec,etal.Synthesis of Ti3Si C2 by infiltration of molten Si,Journal Of Alloys and Compounds,2011,509:L336-339.
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