Thermal and Mechanical Properties of Calcium Lanthanum Sulfide

摘要

The purpose of this effort was the determination of the mechanical and thermal properties of specimens fabricated from calcium lanthanium sulfide (CaLa2S4) by Raytheon Company, Research Division. The test matrix used was designed to obtain sufficient information for comparative design studies and screening of the material with emphasis on those properties which are anticipated to be most critical for a thermostructural environment. The thermal stress resistance was investigated using thermal expansion, thermal conductivity, specific heat and flexure. Sensitivity studies conducted on this class of materials show the critical properties which control the thermal stress response for the general heating rates and geometries of interest here to be the thermal expansion, tensile strength or strain to failure and the ratio of the high temperature compressive modulus to low temperature tensile modulus. The other properties measured have a second order effect on the thermal stress response, but are important for other critical responses.