๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Test method and strength characteristics of alumina ceramics at cryogenic temperatures

โœ Scribed by Nobuhisa Suzuki; Takao Uchida; Kenichi Suzuki

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
213 KB
Volume
38
Category
Article
ISSN
0011-2275

No coin nor oath required. For personal study only.

โœฆ Synopsis

In order to apply ceramic materials for cryogenic components, the bending test method at cryogenic temperatures was developed. For the purpose of tests by threepoint bending, methods of holding the specimens with springs in cryogen and centering the loading rod in the cryostat were developed. Using turret disk type cryogenic tensile apparatus, bending tests with alumina specimens were conducted at 293, 77 and 4 K. The tests showed that the average bending strength increases linearly with decreasing temperature and Weibull modulus was largest at 77 K. The average bending strength ratio of 4 K to 293 K was found to be approximately 1.5, which is generally smaller than the tensile strength ratio of metallic materials.

๐Ÿ“œ SIMILAR VOLUMES

Strength and toughness of ZrO2-based cer
Strength and toughness of ZrO2-based ceramics at cryogenic temperatures
โœ L.I. Lai-feng; Zhang Zhong; Zhao Li-zhong; Tu Zhi-hua; L.I. Yi-yi ๐Ÿ“‚ Article ๐Ÿ“… 1994 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 866 KB

We measured the fracture strength and fracture toughness of ZrOa-based ceramics containing 14.5mo1%, 15.5mo1%, and 16.5mo1% CeO/at 298,77,and 4.2K.The results indicate that there is 56-117% increase in fracture toughness at 4.2K and 47.6-92% increase in fracture strength at 4.2K. The maximum increas