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【国际视野讲堂】第44期:密苏里科技大学W.G. Fahrenholtz教授学术报告会

发布时间:2020-11-16

时间:2020年11月19日(星期四)9:00
地点:会议中心201
主办:js33333线路登录(中国)有限公司

承办:Material Advantage WUT Chapter      
   (全球材料精英计划武汉理工大学分支)

讲座主题:High Entropy Ultra-High Temperature Ceramics:

     From Synthesis to Elevated Temperature Properties

主讲人:Prof. W.G. Fahrenholtz

 

 

报告摘要:

 

High entropy ultra-high temperature ceramics are the subject of increasing research activity. Synthesis methods affect the powder particle size and purity, which also impact the ability to densify the resulting powder. Densification is typically conducted with applied pressure by hot pressing or spark plasma sintering. To date, the most commonly reported properties are hardness and modulus measured by nanoindentation. In our laboratory, high entropy carbides were synthesized by carbothermal reduction of oxides and high entropy borides were synthesized by boro-carbothermal reduction. Both processes produce sub-micron powders with oxygen contents below 1 wt%. Densification was accomplished by hot pressing of carbides and spark plasma sintering of borides. The presentation will also summarize systematic studies of the mechanical and thermal properties of the high entropy ultra-high temperature ceramics that have been produced.


主讲人简介:

 

  W.G. Fahrenholtz是密苏里科技大学材料科学与工程系陶瓷工程董事会杰出教授,也是《美国陶瓷学会杂志》的主编。他分别于1987年和1989年在伊利诺伊大学香槟分校获得陶瓷工程学士和硕士学位。1992年,他在新墨西哥大学(UNM)获得化学工程博士学位。1999年进入密苏里科技大学,获得了多个奖项,包括7个全校教师优秀奖、2个教学奖和一个著名的国家科学基金会的职业成就奖。他于2007年当选为美国陶瓷学会院士,并于2017年1月被任命为《美国陶瓷学会杂志》的主编。他目前的研究重点是在极端热负荷、机械力或化学反应环境中使用的高级结构陶瓷的加工、表征和机械测试。