Gas pressure sintering of Si3N4-based particulate composites and their wear behavior

D. S. Park, H. D. Kim, S. Y. Lee, S. Kim

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

2 Scopus citations

Abstract

Three kinds of Si3N4 based particulate composites were made by adding HfN, ZrN and TiN to Si3N4-6w/o Y2O3-2w/o Al2O3. Variation of sintered density and weight change at temperatures between 1550 C and 2050 C were measured. Mechanical properties were measured on the Si3N4 materials with density higher than 97% TD. Fracture toughness was decreased by adding HfN or ZrN to the monolithic Si3N4 despite higher thermal expansion coefficients of the particulates added than that of the matrix. TiN particulates improved fracture toughness of the Si3N4 material. Flexual strength of the composite was lower than the monolithic Si3N4. Friction coefficients were similar to one another. Wear resistance of the Si3N4 materials were consistent with the wear model suggested by Evans.

Original languageEnglish
Title of host publicationKey Engineering Materials
PublisherPubl by Trans Tech Publ
Pages439-444
Number of pages6
Volume89-91
ISBN (Print)0878496688
StatePublished - 1994
Externally publishedYes
EventProceedings of the International Conference on Silicon Nitride-Based Ceramics - Stuttgart, Ger
Duration: Oct 4 1993Oct 6 1993

Conference

ConferenceProceedings of the International Conference on Silicon Nitride-Based Ceramics
CityStuttgart, Ger
Period10/4/9310/6/93

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