BORON-CONTENT PROFILE OF A BORON-PYROLYTIC GRAPHITE NOSE CONE MODEL
Rept. for 2 Jan-15 May 1966
AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
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The pyrohydrolysis method of determining boron concentration in boron-pyrolytic graphite was evaluated by the analysis of reference samples. The method was found to be applicable and was applied to the determination of the boron-content profile of a boron-pyrolytic graphite nose cone model fabricated by the graded boron composition technique. The results of the analysis conclusively show that the expected boron concentration gradient is absent and that effects on fabricability have been incorrectly attributed to such a secondary anisotropy. Kinetic arguments which favor the existence of the concentration gradient also remain open to question.
- Ceramics, Refractories and Glass
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