Synthesis of MoSi2/WSi2 nanocrystalline powder by mechanical-assistant combustion synthesis method

MoSi2/WSi2 nanocrystalline powder has been successfully synthesized by the mechanical-assistant combustion synthesis method. This method includes a ball-milling process followed by combustion synthesis. The composition and microstructure of the as-milled powder mixture were detected by X-ray diffraction and scanning electron microscopy analyses. Their results show that the Mo(W) solid solution and Si nanocrystals could be obtained during the ball-milling process. Compared with normal powder mixture (Mo + Si + W), it could be easily ignited and high maximum combustion temperature was achieved. It was also confirmed that MoSi2/WSi2 solid solution powder with nanometric structure could be prepared through combustion synthesis method from the mechanical activated powder mixture.