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快速凝固法制备ZrNiSn基Half-Heusler热电材料的微结构
  • ISSN号：1000-324X
  • 期刊名称：《无机材料学报》
  • 时间：0
  • 分类：TB381[一般工业技术—材料科学与工程]
  • 作者机构：[1]浙江大学材料系硅材料国家重点实验室,杭州310027
  • 相关基金：国家基础研究项目（2007CB607502）; 国家“863”研究计划（2007AA03Z234）; 国家自然科学基金（50731006）; 教育部博士点基金（20060335126）
作者： 蔚翠[1], 朱铁军[1], 肖凯[1], 金吉[1], 沈俊杰[1], 杨胜辉[1], 赵新兵[1]
关键词： ZRNISN, 快速凝固, 晶粒尺寸, 微结构, ZrNiSn, rapid solidification, grain sizes, microstructure
中文摘要：

通过悬浮熔炼的方法制备了half-Heusler热电材料Zr（Hf）NiSn（Sb）合金,并进一步通过快速凝固来细化晶粒,通过放电等离子烧结制备块材并测试其热电性能.X射线衍射分析表明获得了单相Half-Heusler化合物.扫描电子显微观察发现,快速凝固后的样品晶粒尺寸在500nm左右,放电等离子烧结后晶粒尺寸并未明显长大.同时观察到在晶粒的表面还分布了很多几十纳米尺寸的小晶粒.快速凝固的样品与熔炼样品相比具有较高的电导率及载流子浓度,据此推断在快速凝固过程中产生的纳米晶粒应为金属相.快速凝固后的样品晶界散射增多,因而具有较低的晶格热导率.

英文摘要：

Thermoelectric materials Zr（Hf）NiSn（Sb） alloys were prepared by levitation melting followed by melt-spinning to refine the microstructure,and then consolidated by spark plasma sintering for the property measurements.XRD analysis showed that the half-Heusler phases were obtained.The microstructures of the melt spun thin ribbons were studied by the scanning electron microscope and transmission electron microscope.The thin ribbons were in the size of a few hundreds nanometers which didn＇t grow too much during the sintering process.Nanocrystals were found in the crystal grains.The carrier concentration increased for the melt-spinning samples compared with the levitation melting samples,indicating that the nanocrystals were metallic.The increasing boundary scattering after melt-spinning made the lattice thermal conductivity decrease.

同期刊论文项目
高性能热电材料的非平衡态制备科学和电声输运协调
期刊论文 148 获奖 2 专利 10
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期刊信息
  • 《无机材料学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国科学院上海硅酸盐所
  • 主编：郭景坤
  • 地址：上海市定西路1295号
  • 邮编：200050
  • 邮箱：wjclxb@mail.sic.ac.cn
  • 电话：021-52411302
  • 国际标准刊号：ISSN：1000-324X
  • 国内统一刊号：ISSN：31-1363/TQ
  • 邮发代号:4-504
  • 获奖情况:
  • 获"中国百种杰出学术期刊"称号
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,美国科学引文索引（扩展库）,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,瑞典开放获取期刊指南,中国北大核心期刊（2000版）
  • 被引量:21274