FRACTURE-TOUGHNESS AND STRENGTH CHANGE OF NEUTRON-IRRADIATED CERAMIC MATERIALS

被引：13

作者：

DIENST, W

ZIMMERMANN, H

机构：

[1] Association KfK-Euratom, Kernforschungszentrum Karlsruhe, Institut für Materialforschung I, 76021 Karlsruhe

来源：

JOURNAL OF NUCLEAR MATERIALS | 1994年 / 212卷 / pt B期

关键词：

Bending (deformation) - Crystal orientation - Crystalline materials - Defects - Fracture - Fracture testing - Mechanical variables measurement - Neutrons - Radiation damage - Strength of materials - Thermal effects;

D O I：

10.1016/0022-3115(94)91001-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to analyse the results of bending strength measurements on neutron-irradiated samples of Al2O3, AlN and SiC, fracture toughness measurements were additionally conducted. The neutron fluences concerned were mostly in the range of 0.6 to 3.2 x 10(26) n/m(2) at irradiation temperatures of 400 to 550 degrees C. A fracture toughness decrease was generally observed for polycrystalline materials which, however, was considerably smaller than the reduction of the fracture strength. Exceptional increase of the fracture toughness seems typical for the effect of rather coarse irradiation defects. The irradiation-induced change of the fracture toughness of single crystal Al2O3 appeared dependent on the crystallographic orientation; both reduced and increased fracture toughness after irradiation was observed. Recent results of neutron irradiation to about 2X10(25) n/m(2) at 100 degrees C showed, that the strength decrease of various Al2O3 grades sets in at (3-5)x 10(24) n/m(2) and seems to be little dependent on the irradiation temperature.

引用

页码：1091 / 1095

页数：5

共 6 条

[1] THE EFFECT OF ELEVATED-TEMPERATURE NEUTRON-IRRADIATION ON FRACTURE-TOUGHNESS OF CERAMICS [J].