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无机材料学报

无机材料学报

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热压云母微晶玻璃的晶体取向与力学性能

程慷果; 万菊林; 梁开明   

  1. 清华大学材料科学与工程系; 北京100084
  • 收稿日期:1996-12-04 修回日期:1997-01-20 出版日期:1997-12-20 网络出版日期:1997-12-20

Preferential Orientation and Mechanical Properties of Hot-Pressed Micacontaining Glass-Ceramics

CHENG Kangguo; WAN Julin; LIANG Kaiming   

  1. Department of Materials Science and Engineering; Tsinghua University Beijing 100084 China
  • Received:1996-12-04 Revised:1997-01-20 Published:1997-12-20 Online:1997-12-20

PDF (PC)

1096

被引次数

42

摘要： 采用热压的方法，首次制备出具有择优取向的新型云母微晶玻璃．X光衍射分析（XRD）表明，热压后的材料中形成了｛00l｝＜uvw＞型丝织构.云母晶体的空间取向分布函数具有f（θ）=1-Aexp-B/θ的形式。材料的织构型程度开始随热压形变量的增加而增加，当形变量超过一定值后，材料的织构程度基本保持不变；材料平行于热压方向的抗弯强度和断裂韧性一直随形变量的增加而增加．

关键词: 云母微晶玻璃, 热压, 择优取向, 力学性能

Abstract: A new type of mica-containing glass-ceramics with preferentially orientated microstructure was successfully fabricated by hot-pressing the
material after the crystallization process. The fiber texture {00l}<uvw> was identified in the material by means of X-ray diffraction analysis(XRD).
The space orientation distribution function of grains was determined as f(θ)=1-Aexp-B/θ. As the deformation amount of hot-
press increases, the preferential orientation degree increases to a certain value and then keeps constant. However, the flexural strength and fracture
toughness of the material continuously increases with the increase in the deformation amount of hot-pressing.

Key words: mica-containing glass-ceramics, hot-press, preferential orientation, mechanical properties