VISCOELASTIC EFFECTS IN A PHOSPHATE GLASS-METAL SEAL

被引：21

作者：

CHAMBERS, RS

GERSTLE, FP

MONROE, SL

机构：

[1] SANDIA NATL LABS,DIV APPL MECH 3,ALBUQUERQUE,NM 87185

[2] SANDIA NATL LABS,DIV CERAM DEV,ALBUQUERQUE,NM 87185

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1989年 / 72卷 / 06期

关键词：

Glass - Viscoelasticity - Glass transition - Seals;

D O I：

10.1111/j.1151-2916.1989.tb06246.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A family of phosphate glasses has been developed with thermal expansion behavior in the elastic range that nearly matches the response of 304 stainless steel. Attempts to make concentric pin-shell seals consistently have yielded fractures between 400° and 300°C during cooling. Elastic stress analyses which neglect glass transitional behavior and utilize constant glassy (elastic) thermal expansion coefficients predict a residual stress state that is compressive. However, viscoelastic computations which include the effects of structural relaxation during glass transition show that tensile stresses sufficient to cause failure arise during cooldown of the seal.

引用

页码：929 / 932

页数：4