Citation

Wei WC, Lee JS. Journal of the European Ceramic Society 1998; 18(5): 509-520.

Copyright

(Copyright © 1998)

DOI

10.1016/s0955-2219(97)00156-8

PMID

unavailable

Abstract

Mo/Si/SiC composite powder was first prepared by a process combining dissolution-precipitation, spray-drying and hydrogen reduction steps. The powder was then hot-pressed at the temperatures ≥1400°C to form MoSi2/SiC composites. The analysis on the phase reactions of Mo/Si/SiC, grain growth kinetics of Mo grains, and the transformation kinetics of Mo5Si3 and MoSi2 phases during and after H2 reduction was completed by quantitative XRD technique. In addition, the powders and hot-pressed composites were characterized by SEM, TEM, and HRTEM, appeared virtuous properties of uniform chemical composition and fine grains. The mechanical properties, including flexure strength, hardness, and toughness of some densified composites, are reported and compared to the properties of pure MoSi2 and SiC. © 1998 Elsevier Science Limited. All rights reserved.

Language: en

Keywords

Bending strength; Composite materials; Composition; Grain growth; Hardness; High resolution transmission electron microscopy; Molybdenum; Molybdenum compounds; Phase reaction; Phase transitions; Reaction kinetics; Scanning electron microscopy; Silicide; Silicon carbide; Spray drying; Transmission electron microscopy; X ray diffraction