Accession Number : AD0756400

Title :   Growth and Mechanical Properties of the Whiskers of Boron and Some Borides.

Descriptive Note : Technical rept.,

Corporate Author : WATERVLIET ARSENAL N Y

Personal Author(s) : Ahmad,Iqbal

Report Date : JUN 1968

Pagination or Media Count : 81

Abstract : Whiskers of beta-rhombohedral boron were prepared by heating boron pieces in boron nitride crucibles, both in an inert gas atmosphere and in vacuum in the temperature range 1850-1950C. The elastic modulus of these whiskers and tensile strengths are discussed. During this work, whiskers of CaB6, B4C, and B72 were also ovserved to form due to the presence of impurities in BN and in the argon. Whiskers of gamma- TaB also formed as a result of the interaction of BN and the tantalum susceptro used. (Author Modified Abstract)

Descriptors :   (*WHISKERS(CRYSTALS), *BORIDES), (*BORON, WHISKERS(CRYSTALS)), REFRACTORY MATERIALS, CALCIUM COMPOUNDS, NITRIDES, OXIDES, BORON COMPOUNDS, TANTALUM COMPOUNDS, MECHANICAL PROPERTIES, SINGLE CRYSTALS, CRYSTAL GROWTH, CARBIDES

Subject Categories : Ceramics, Refractories and Glass
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE