李文波,杨屹,刘剑,杨刚

• 1:四川大学制造科学与工程学院

摘要(Abstract)：

采用Gleeble-3500D热模拟机研究预设升温速度对WC-Co体系在电场作用下烧结过程的影响。研究了试样在烧结过程中的升温特点和收缩特性,结合对产物的X射线衍射分析(XRD)以及扫描电镜(SEM)等的分析。结果表明,在较高的升温速度下,电场作用可降低体系的共晶反应温度(750℃);烧结过程中出现了不平衡反应,生成了CO3W3C,CO6W6C的中间相,随着升温速度的升高,中间相逐渐转变和分解;此外,预设升温速度的高低影响了体系液相量的多少和分布,以50℃/s的升温速度升温,液相产生适中且分布较均匀;反应产物WC颗粒的平均尺寸随着升温速度的增加,发生了不同程度得减小,但均远远小于传统真空烧结后颗粒的平均尺寸。

关键词(KeyWords)： 热模拟;WC-Co;电场;中间相

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50945018)

作者(Author): 李文波,杨屹,刘剑,杨刚

DOI: 10.13289/j.issn.1009-6264.2010.08.029

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