This paper dealt with the microstructures and the mechanical properties of monolithic SiC and SiC/SiC composite materials fabricated by the melt infiltration process. The characterization of melt infiltrated SiC and SiC/SiC composite materials with different sizes of starting SiC particles was investigated by means of electron microscopies, three point bending tests and single-fiber push-out tests. Based on the mechanical property-microstructure correlation, process optimization methodology also was discussed. The flexural strength of melt infiltrated SiC material strongly depended on the content of residual silicon, which associated with the preparation route of C/SiC matrix slurry such as the composition ratio of C and SiC particles and the size of raw SiC particles. MI-SiC/SiC composites represented good flexural strength, even if the instability of matrix morphology and the interfacial debonding were occurred.
A new surface treatment method for aluminum borate whisker was developed in order to suppress the interfacial reaction between the whisker and aluminum alloy. By depositing Mg on the whiskers under 10 Pa at 650°C for 3.6 ks, and heating them in air at 800°C for 1.8 ks, a uniform MgAl 2 O 4 layer with a thickness of 10-20 nm covered the whisker.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.