کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1581927 | 1514865 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Microstructure and mechanical properties of vacuum hot-pressing SiC/Ti–Cu–Ni–Sn bulk metallic glass composites Microstructure and mechanical properties of vacuum hot-pressing SiC/Ti–Cu–Ni–Sn bulk metallic glass composites](/preview/png/1581927.png)
In the present study, Ti50Cu28Ni15Sn7 (at.%) metallic glass and its composite powders reinforced with 4–12 vol.% of added SiC were successfully prepared by mechanical alloying. In the ball-milled composites, an amorphous matrix with a homogeneous dispersion of SiC particles was developed. The metallic glass composite powders were found to exhibit a large supercooled liquid region before crystallization. The presence of SiC particles did not change the glass-formation ability of the amorphous Ti50Cu28Ni15Sn7 powders. Consolidation of the as-milled Ti50Cu28Ni15Sn7 composite powders was performed at a temperature slightly higher than the glass-transition temperature under a pressure of ∼1.2 GPa; using this method, the bulk metallic glass composite discs were prepared successfully. However, partial crystallization of the amorphous matrix during the hot-pressing process was noticed. The fracture strength of consolidated composite compacts was increased with SiC additions. The pre-existing particle boundaries may serve as the crack initiation sites which resulted in the brittle failure of the Ti50Cu28Ni15Sn7 BMG composites.
Journal: Materials Science and Engineering: A - Volume 493, Issues 1–2, 15 October 2008, Pages 246–250