Synthesis of Mo–Si–B in situ composites by mechanical alloying

• Published in: Journal of alloys and compounds Vol. 434; pp. 420 - 423
• Main Authors: Yamauchi, Akira, Yoshimi, Kyosuke, Kurokawa, Kazuya, Hanada, Shuji
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 31.05.2007
• Subjects: Mechanical alloying; Molybdenum silicides; Spark plasma sintering; X-ray diffraction; X-ray diffraction; Spark plasma sintering; Molybdenum silicides; Mechanical alloying
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2006.08.218

In this study, the synthesis of Mo–Si–B multi-phase alloys, so-called in situ composites, was attempted with the combination of mechanical alloying (MA) and spark plasma sintering (SPS) processes. MA was conducted with mixed powders of Mo, Si and B using a planetary ball mill under various milling conditions. MAed powders were characterized by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The results obtained by XRD indicated that Mo–Si–B alloyed powders were successfully produced when elemental powders were milled at a higher milling energy. Vacuum heat treatments after the MA process promoted the formation of Mo–Si–B intermetallic phase in MAed powders. MAed powders were successfully consolidated by SPS and sound compacts of Mo 5SiB 2-based composites were synthesized.