نوع مقاله : مقاله پژوهشی
نویسندگان
1 مهندسی مواد،دانشگاه صنعتی مالک اشتر تهران،گروه مواد مرکب،تهران ،ایران
2 عضو هیأت علمی / دانشگاه صنعتی مالک اشتر
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Manufacturing of metal matrix composites (MMCs) using the pressure less Sintering process is a suitable Method of producing parts with the lowest cost. In this study, the microstructure and mechanical properties of Ti-TiB composite were investigated. Titanium and titanium matrix composites were mixed with 4, 8 and 12 %wt reinforced in a ball mill and pressed under a pressure of 500 MPa for 30 minutes. Then, they were sintered under argon gas flow for 90 minutes using pressure less sintering at 1400 °C.
The microstructure and mechanical properties were investigated. XRD results and FESEM observations confirm the formation of TiB in-situ whiskers as a result of the reaction between Ti and TiB2. The measured mechanical properties show that the density of the specimens increase with the formation of TiB in-situ whiskeys, but the flexural bending of the samples, decreases from 2294 MPa to 994 MPa.
The hardness of the samples also was measured based on Vickers hardness. The Ti-12wt% TiB2 composite provided the highest hardness, and the hardness of the composite was about 127% higher than that of pure titanium by adding 12% by weight of reinforcement.
کلیدواژهها [English]
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