Abstract
A MoSi 2-based composite reinforced with 20 vol.% Si 3N 4 rodlike crystals was fabricated by Spark Plasma Sintering (SPS) process. The microstructure and mechanical properties of the composite were investigated. Relative densities of the monolithic material and composite were above 95%. No reactions between Si 3N 4 and MoSi 2 were observed. The composite containing Si 3N 4 rodlike crystal had higher hardness than monolithic MoSi 2. The room-temperature flexural strength increased 60% compared to that of pure MoSi 2. Especially the room-temperature fracture toughness of the composites was higher than that of MoSi 2, from 3.6 MPa m 1/2 for MoSi 2 to 5.1 MPa m 1/2 for composites with 20 vol.% Si 3N 4, respectively. Besides, the yield strength at elevated temperature and the low-temperature oxidation resistance for 20 vol.% Si 3N 4–MoSi 2 composite exhibited considerable improvement over that of monolithic MoSi 2. These results showed that Si 3N 4 rodlike crystal is an effective reinforcement for MoSi 2.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
