THE PREPARATION AND SOME PROPERTIES OF CHROMIC OXIDE-CHROMIUM CERMETS.

II.—Preparation Directly from Mixtures of Oxide and Metal, and of Oxide, Metal, and Graphite

H. E. N. STONEHigh-Temperature Materials SectionDepartment of Metallurgy and Materials Technology, Battersea College of Technology, London , S.W.11.

N. A. LOCKINGTONHigh-Temperature Materials SectionDepartment of Metallurgy and Materials Technology, Battersea College of Technology, London , S.W.11.

Abstract

Compacts of chromium oxide/chromium mixtures have been sintered in vacuum at temperatures up to 1600°C to produce cermets. Two types of chromium powder were used—an electrolytic and an aluminothermic powder. The effect of chromium content and of sintering temperature on the sintered density and microstructure has been studied and supplemented by tests of hardness and compressive strength.

Considerable densification was achieved by additions of chromium in the range 1–50 wt.-%, with the optimum content at 5–10%. Compressive strengths < 10 tons/in² were attained over a wide range of composition.

Notes

* Manuscript received 17 November 1964.

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THE PREPARATION AND SOME PROPERTIES OF CHROMIC OXIDE-CHROMIUM CERMETS.

II.—Preparation Directly from Mixtures of Oxide and Metal, and of Oxide, Metal, and Graphite

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THE PREPARATION AND SOME PROPERTIES OF CHROMIC OXIDE-CHROMIUM CERMETS.

II.—Preparation Directly from Mixtures of Oxide and Metal, and of Oxide, Metal, and Graphite

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