Toughening effect and oxidation behavior of MoSi2-ZrO2 composites
Poster (konferens), 2006

Abstract Toughening effect of ZrO2-particles on MoSi2-based materials is one of the important toughening mechanism. In this work, the influence of particle size and volume percentage of unstabilized ZrO2-addition on toughening effect 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 three different sintering processes: pressure-less sintering (PLS), hot-press sintering (HPS) and PLS + Hipping sintering. The measured data 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.

Composites

Powder metallurgy

Toughening

Molybdenum desilicide

Författare

Karin Anne Xia Gong

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Yiming Yao

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Erik Ström

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Changhai Li

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Boston,MA 2006,MRS Fall meeting; November27-December 1,Hynes Convention Center & Sheraton Boston Hotel Boston,MA

Vol. 980 0980-II05-35 339-344

Ämneskategorier

Annan materialteknik