Hot hardness of ceramic cutting tools using depth of penetration measurements

E. A. Payzant, H. W. King, S. Das Gupta, J. K. Jacobs

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

A prototype hot hardness tester manufactured by Electrofuel Manufacturing Co., Ltd. is evaluated by measuring the hardness of two ceramic cutting tool materials. Hardness values derived from the diagonals of indentations are comparable with Vickers hardness measurements made on a standard microhardness tester. The room temperature hardness of the ceramic composite Alotic is greater than that of a composite of Si3N4 with additions of TiN. At higher temperatures, the hardness of the Alotic composite falls more rapidly than that of the Si3N4 composite, and this is associated with softening of the Al2O3 matrix. For a rigidly supported specimen, the plastic component of the traverse of the indenter can be isolated from the total traverse, and used as a measure of the depth of the impression for calculating Vickers hardness values from high temperature indentations.

Original languageEnglish
Title of host publicationUnknown Host Publication Title
PublisherPubl by Canadian Institute of Mining, Metallurgy and Petroleum
Pages399-405
Number of pages7
ISBN (Print)0919086438
StatePublished - 1993
Externally publishedYes
EventProceedings of the International Symposium on Developments and Applications of Ceramics and New Metal Alloys - Quebec City, Que, Can
Duration: Aug 29 1993Sep 2 1993

Conference

ConferenceProceedings of the International Symposium on Developments and Applications of Ceramics and New Metal Alloys
CityQuebec City, Que, Can
Period08/29/9309/2/93

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