陈 硕,赵忠民,张 龙,程兆刚,于贵波.中间钛片对TiB2基陶瓷/钛合金梯度复合材料组织性能的影响[J].稀有金属材料与工程,2018,47(3):788~793.[Chen Shuo,Zhao Zhongmin,Zhang Long,Cheng Zhaogang,Yu Guibo.Effects of Ti sheet insert on microstructure and properties of graded composites of TiB2-based ceramic and Ti-6Al-4V steel[J].Rare Metal Materials and Engineering,2018,47(3):788~793.]
中间钛片对TiB2基陶瓷/钛合金梯度复合材料组织性能的影响
投稿时间:2016-03-18  修订日期:2016-04-20
中文关键词:  梯度复合  自蔓延  界面结构  原子互扩散  热匹配
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      在钛合金与陶瓷粉末之间引入厚度从0.5mm到1.5mm的中间钛片,采用自蔓延离心熔铸工艺快速制备出了TiB2基陶瓷/钛合金梯度复合材料,经过XRD, FESEM 和 EDS分析表明,添加钛片对陶瓷相没有明显的影响,但随着中间钛片厚度的增加,不仅细化陶瓷基体并改善其组织均匀性,而且增加了梯度界面厚度,减小甚至消除了钛合金基底热影响区。同时,热真空条件下液态陶瓷与钛合金之间发生熔化连接和原子互扩散,进而在凝固后期诱发TiB2与Ti液的包晶反应 ,TiB自Ti液中的析晶反应和TiB与Ti液的共晶反应,实现了TiB2的消减及TiB的生长,不仅改善了界面的残余应力,而且获得了陶瓷/钛合金多尺度多层次复合。界面组织结构的梯度演化与陶瓷/钛合金的热匹配不仅使梯度材料的硬度呈连续变化,而且使界面剪切强度达到了316±25 MPa。
Effects of Ti sheet insert on microstructure and properties of graded composites of TiB2-based ceramic and Ti-6Al-4V steel
英文关键词:graded composite  self-propagating synthesis  interfacial microstructure  atomic interdiffusion  thermal match
英文摘要:
      By inserting Ti sheet between ceramic powder and Ti alloy steel, (TiC-TiB2)/Ti-6Al-4V graded composites were rapidly prepared by SHS centrifugal-casting process under different Ti sheet thickness from 0.5 mm to 1.5 mm. XRD, FESEM and EDS results showed that there was no significant change in phase composition of the ceramic matrix, but promoted the microstructure refinement of the reaction products with the thickness increased. Meanwhile, the introduction of Ti sheet not only enhances the thickness of the gradient interface, but also decreased the thermal infected zone of interface. Moreover, fusion bonding and atomic interdiffusion between liquid TiC-TiB2 and excessive Ti liquid in thermal vacuum circumstances were considered to initiate peritectic reaction of , direct growth of TiB solids from liquid Ti and eutectic reaction of TiB solids and liquid Ti at the final stage of joint solidification, so that consumption of TiB2 solids and increase of TiB crystal improved the interface residual stress, and the joint of the ceramic to Ti alloy was achieved in multilevel and multiscale. The joint in better thermal match and continuously-graded microstructure represents not only a transitional change in Vickers hardness but also the high shear strength of 316±25 MPa between the ceramic and Ti alloy.
作者单位E-mail
陈 硕 军械工程学院 1136445516@qq.com 
赵忠民 军械工程学院 zhaozoom@sina.com 
张 龙 军械工程学院  
程兆刚 军械工程学院  
于贵波 军械工程学院  
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