Effect of Sintering Aids Sorts on Properties of Prepared Al₂O₃-Al Cermet

Abstract:

Cermet while maintaining the excellent properties of ceramic materials, but also have the advantages of a metal material, is an important new engineering materials. In this paper, Al-Al₂O₃ cermet is prepared adding different sintering aids via the powder metallurgy method to study the properties of Al-Al₂O₃ cermet. The conclusions are shown the adding sintering aids can significantly improve the sintered density of Al-Al₂O₃ cermet. The sintering aiding effect of adding MgO is better than that of SiO₂ and Y₂O₃, and the hardness and the strength of the sample are higher than those of samples with SiO₂ and Y₂O₃, and the densification degree of Al-Al₂O₃ metal ceramic material is the best, the relative density is 94.8%, the surface hardness is 824HV. The flatness of the surface of the sample adding MgO shows that the bonding strength between aluminum powder and alumina powder is high. The prepared Al-Al₂O₃ cermet adding different sintering aids have higher density and fewer pores in the microstructure the prepared Al-Al₂O₃ cermet adding sintering aids has a package structure.

• Periodical: Solid State Phenomena (Volume 281)
• Pages: 297-302
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.281.297
• Online since: August 2018
• Authors: Rui Hua Wang, Xiao Bo Bai, Xiao Dong Jiang, Deng Liang Yi, Fang Wang, Ai Xia Chen, Jie Guang Song*, Lin Chen
• Keywords: Alumina, Cermet Materials, Powder Metallurgy Method, Sintering Aids

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