Toughening Effect and Oxidation Behavior of MoSi2-ZrO2 Composites
Journal article, 2007

Toughening effect of ZrO2-particles on MoSi2-based materials is one of the important toughening mechanisms. In this work, the influence of particle size and volume percentage of unstabilized ZrO2-addition on toughening in MoSi2-matrix composites was studied. The measured data revealed that the fine particle size, < 1 μm, with certain volume percentages around 20% have given more effective toughening results. The tested materials were prepared by two different sintering processes: pressure-less sintering (PLS) and PLS + Hipping sintering. The results on sintered density, RT-hardness and RT-toughness indicated that the PLS process could be a practical and economical method for producing MOSi2-ZrO2 composites in industry. Oxidation behavior of MoSi2-ZrO2 composites was also studied in the work. Clearly, the ZrO2-addition made the composites having a worse oxidation resistance than the monolithic MoSi2, which means that a low ZrO2-addition should be used in the composites, as far as an acceptable toughening effect was reached.






Karin Anne Xia Gong

Chalmers, Materials and Manufacturing Technology

Changhai Li

Chalmers, Materials and Manufacturing Technology

Yiming Yao

Chalmers, Materials and Manufacturing Technology, Materials Technology

Materials Research Society Symposium Proceedings

0272-9172 (ISSN)

Vol. 980 339-344

Subject Categories

Materials Engineering

Other Materials Engineering

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9/7/2020 8