Molybdenum News Center

The main way to solve the problem of low-temperature ductility and high temperature oxidation of molybdenum is to develop a molybdenum disilicide (MoSi2) as the base of advanced composite materials. 

 

Molybdenum in contact with oxygen forming Mo02 sublimation at 800 ℃ to give a yellow-white shade-like condensing, molybdenum advantage to play on the high-temperature strength and creep resistance caused serious engineering problems. To this end the use of the self-healing ability of silicon-rich coating, but this coating effect of thermal cycling capability is poor. The high temperature strength and oxidation resistance to molybdenum disilicide matrix composites for Mo-Si-B is excellent, but poor ductility, limited production of small quantities of commercial products. To solve the problem ductility determine this molybdenum - silicon - the composition range boron composites, in addition to making the odd good oxidation resistance, the high temperature mechanical properties and TZM alloy fairly. The composite material to Mo5SiB (T2) as the matrix phase and the second phase of molybdenum. Phase to improve the ductility of metal matrix composites may be formed with a self-healing scale. Also currently made ​​of titanium added Mo-6Ti-2.2Si-1.1B at 1370 ℃ composites exposed to air two hours, the change is imperceptible, but also is superior than TZM. This is a molybdenum-based alloys a remarkable achievement.

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