Phase transformation and microstructure of Mo2FeB2 based cermets by spark plasma sintering

发布时间:2021-09-25 00:02:25

Phase transformation and microstructure of Mo2FeB2 based cermets by spark plasma sintering 【Abstract】Mo2FeB2 based cermets were prepared by spark plasma sintering (SPS) The microstructure evolution and phase transformation were studied by using scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD) in comparison with conventional vacuum sintering (CVS) .It was found that the SPS remarkably accelerated phase transformation and decreased the end sintering temperature.A large amount of Mo2FeB2 hard phase occurred for the sintering temperature of 750℃ by SPS, and no Mo2FeB2 phase was detected for the sintering temperature below 900℃ by CVS. Almost full densification was obtained for the sintering temperature of 1050 ℃ by SPS , However , the microstructure was uneven, and a significant exudation of the liquid phase through the clearance between SPS punches and die was present in this stage. 【Key words】Mo2FeB2 based cermets;Phase transformation;Spark plasma sintering;Microstructure 0.Introduction Ternary boride based cermets and their application as engineering materials have been intensively studied[1-2]. At present, Mo2FeB2 based cermets are attracting much attention because of cheap raw material , simple preparation method and superior mechanical properties[3-4]. It is widely accepted that the mechanical properties of the cermets can be improved greatly by reducing the grain sizes. However, it is very difficult to produce the cermets with grain size of below 0.2μm by using conventional vacuum sintering and even hot isostatic pressing.Recently, interest has been growing in the use of spark plasma sintering ( SPS) to fabricate grained materials. There were some successful examples for SPS to obtain innovative materials[5-7]. However, the preparation of Mo2FeB2 based cermets by SPS has not been reported up to date. Therefore, the present work was aimed at preparation of Mo2FeB2 based cermet by SPS and investigated the phase transformation during SPS and microstructure characteristics by SPS. 1.Experimental procedure Commercially available Mo(4μm) , carbonyl Fe(3.5μm) , FeB(45μm) , Cr(45μm) ,Ni(3μm)and C(5.5μm) powders were used as raw materials. These powders were mixed in a planetary ball-mill in ethanol together with cemented carbides balls for 24h at a speed of 150rpm (rotations per minute) .After milling, the slurries were dried at 80℃ in an infrared stove, and then sieved through 200mesh. After that, the powders were compacted by SPS, whi

相关文档

  • Microstructure and densification of ZrB2–SiC composites prepared by spark plasma sintering
  • Low-temperature sintering of ZrW2O8–SiO2 by spark plasma sintering
  • 2.05 Spark Plasma Sintering of Nanoceramic Composites
  • Effect of microstructure on oxidation resistance of MoSi2 fabricated by spark plasma sintering
  • 18 Microstructure and densification of ZrB2–SiC composites prepared by spark plasma sintering
  • PHASE TRANSFORMATION AND MICROSTRUCTURAL CHANGES OF SI3N4 DURING SINTERING
  • Sintering, consolidation, reaction and crystal growth by the spark plasma system (SPS
  • TiB2-based cermets by spark plasma sinteringwith CoCrFeNiTiAl high-entropy alloy as sintering aid
  • transformation and microstructure of nano hard phase Ti(C,N)
  • microstructures and mechanical properties of TiAl alloys consolidated by spark plasma sintering
  • 猜你喜欢

  • 汽车如何打蜡汽车打蜡方法
  • 东营区绍娥木地板经营店(企业信用报告)- 天眼查
  • 关于责任优美的句子
  • 642移动电源板承认书
  • 女神三国商城区域功能说明
  • 商务苹果风灰白色简约通用PPT模板
  • 粮食仓储物流及食品加工项目可行性研究报告
  • 初中七年级语文下册(人教版)春夜洛城闻笛 (1)ppt课件
  • 鲁教版(五四)化学九年级9.2《海水晒盐》ppt课件3
  • 如何提高小学生数学成绩经验交流发言稿
  • 高考语文作文必背励志素材
  • 我最敬佩的人_小学四年级作文800字
  • 家庭暴力分析及防治的法律思考
  • 应激性溃疡及其防治策略方案
  • 北京市公安局公安交通管理局通告二?一三年第31号——关于首都机
  • 教科版小学品德与社会三年级上册过年啦-课件
  • 户外活动观察记录表
  • 4A国际广告公司创意简报撰写培训ppt
  • 2019年最新最新高中年级优秀入团志愿书范文入团申请书文档【十篇】 (6)
  • 生活中两种常见的有机物ppt21 人教课标版(1)
  • 第课__对客观世界的主观表达_走进意象艺术
  • 关于百家湖小学教室环境设计及其教育文化意蕴的调查报告
  • 1、写出单环芳烃C6H12的同分异构体的构造式并命名之汇总
  • 不说脏话倡议书
  • 中共惠州市委、惠州市人民政府关于印发《惠州市巩固提高创建全国
  • 【K12教育学*资料】九年级政治上学期期中考试(无答案)
  • 天津美得乐冷冻食品有限公司企业信息报告-天眼查
  • 狂人日记读后感100字
  • 盱眙县猪肥肥生猪养殖专业合作社(企业信用报告)- 天眼查
  • 个人工作计划书怎么写
  • 语文中考知识点答题技巧整理1
  • 上海鑫韵美容有限公司企业信用报告-天眼查
  • 应届毕业生找工作时的自我介绍
  • 【初中作文】《蓝鲸的眼睛》读后感600字
  • 假期旅游英语对话精选
  • 参观印刷厂观后感三篇
  • 证券从业资格考试证券投资基金第五章考点
  • 最令女人着迷的七句情话
  • 巧用“木桶效应”进行班级管理
  • 江苏省南京市2017年中考思想品德真题试题(含解析)[精品]
  • 迟到的祝福TheLateWishes
  • 【推荐下载】入党个人学*心得体会-推荐word版 (1页)
  • 电脑版