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Preparation and properties of coated silica/aluminum cermet materials via powder metallurgy method

Journal of Ceramic Processing Research
약어 : J. Ceram. Process. Res.
2020 vol.21, no.2, pp.143 - 147
DOI : 10.36410/jcpr.2020.21.2.143
발행기관 : 한양대학교 청정에너지연구소
연구분야 : 재료공학
Copyright © 한양대학교 청정에너지연구소
123 회 열람

Cermet is a combination of metal and ceramic, it exhibits some special properties, so it is one of the most widely usedengineering materials. In this paper, the properties of encapsulated SiO2/Al cermet were prepared by powder metallurgymethod. Results showed that the density of SiO2/Al cermet is increased with an increasing Al content. When the Al contentis high, and the high temperature is sintered, the liquid phase can fully bond the surrounding SiO2 particles to form a relativelycontinuous and dense structure, thereby obtaining a high microstructure density. When the SiO2:Al ratio is increased from 1:1to 1:3, the hardness is gradually increased. The hardness and density of the sample are gradually increased with an increasingmolding pressure. The surface hardness of the cermet is increased first and then decreased with an increasing sinteringtemperature. When the SiO2:Al ratio is 1:3, the holding time is 10 min under molding pressure of 15 MPa, and the sinteringtemperature is 900 °C for 1 h, the surface hardness of the obtained coated SiO2/Al cermet is high, the value is 175.2 HV.

Cermet, aluminum, silica, surface hardness, powder metallurgy method.

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