High-temperature thermal expansion behaviour of C/SiC studied using an in-situ optical visualisation method and numerical simulations in a quartz lamp array heating environment

2021 ◽  
Author(s):  
Zhi Zhang ◽  
Jinsong Zhang ◽  
Mengkun Yue ◽  
Wen Yue ◽  
Zhe Qu ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Numerical Simulations ◽  
Thermal Expansion Behaviour ◽  
Expansion Behaviour ◽  
Visualisation Method

Degradation of Rocks, Through Cracking Caused by Differential Thermal Expansion, in Relation to Nuclear Waste Repositories

1981 ◽  
Vol 6 ◽  
Author(s):  
J.R. Mclaren ◽  
R.W. Davidge ◽  
I. Titchell ◽  
K. Sincock ◽  
A. Bromley
Keyword(s):  
Thermal Expansion ◽  
Grain Boundary ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Crack Density ◽  
Granitic Rocks ◽  
Multiphase Materials ◽  
Thermal Expansion Behaviour ◽  
Waste Repositories ◽  
Expansion Behaviour

ABSTRACTHeating to temperatures up to 500°C, gives a reduction in Young's modulus and increase in permeability of granitic rocks and it is likely that a major reason is grain boundary cracking. The cracking of grain boundary facets in polycrystalline multiphase materials showing anisotropic thermal expansion behaviour is controlled by several microstructural factors in addition to the intrinsic thermal and elastic properties. Of specific interest are the relative orientations of the two grains meeting at the facet, and the size of the facet; these factors thus introduce two statistical aspects to the problem and these are introduced to give quantitative data on crack density versus temperature. The theory is compared with experimental measurements of Young's modulus and permeability for various rocks as a function of temperature. There is good qualitative agreement, and the additional (mainly microstructural) data required for a quantitative comparison are defined.

The Thermal Expansion Behaviour of Sulphur Doped GaAs Crystals

1991 ◽  
Vol 126 (1) ◽  
pp. K43-K47 ◽  
Author(s):  
J. Bak-Misiuk ◽  
J. Köhler ◽  
U. Pietsch
Keyword(s):  
Thermal Expansion ◽  
Thermal Expansion Behaviour ◽  
Expansion Behaviour
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