Accession Number : AD0285563

Title :   MECHANICAL PROPERTIES OF SILICON CARBIDE SINGLE CRYSTALS

Corporate Author : CARBORUNDUM CO NIAGARA FALLS N Y

Personal Author(s) : BATHA,H.D. ; HASSELMAN,D.P.H.

Report Date : SEP 1962

Pagination or Media Count : 37

Abstract : Research was conducted to investigate the mechanical properties of vapor phase grown single crystals of silicon carbide. Equipment was designed to deform the crystals in bending by three-point loading. Preliminary results for Young's modulus of elasticity and crossbending strength are reported. Values of strength as high as one million psi were obtained. A correlation was found between sample thickness and strength. The strength at 1750 C considerably exceeds the strength at room temperature. No evidence of gross pl stic deformation under mechanical load was found as high as 1800 C. Some observations were made of dislocation motion during etching at 900 C in borax. (Author)

Descriptors :   *CARBIDES, *SILICON COMPOUNDS, *SINGLE CRYSTALS, CERAMIC MATERIALS, DEFORMATION, EGGS, FRACTURE (MECHANICS), GROWTH(PHYSIOLOGY), MAGNESIUM COMPOUNDS, MECHANICAL PROPERTIES, OXIDES, PICKLING, PLASTIC PROPERTIES, SHEAR STRESSES, ULTRASONIC RADIATION, VAPORIZATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE