Evolution of the phase composition of ZrB2-35MoSi2-15Al composite coating at annealing

Abstract In this article, new composite coatings ZrB 2 -35MoSi -15Al were deposited on the surface of a carbon-carbon using multi-chamber detonation accelerator. The evolution phase composition was analyzed with differential scanning calorimeter (DSC) and X-ray diffractometry (in situ HT-XRD) at temperatures from room temperature (∼ 25°C) to 1400°C (normal atmosphere pressure). coating before annealing according data is tetragonal (t-ZrO ) monocline (m-ZrO zirconium dioxide, silicon oxide (m-SiO ), hexagonal diboride (h-ZrB molybdenum disilicide (t-MoSi cubic aluminum (c-Al) yttrium (c-Y O 3 ). It found that crystallizes in m-ZrO 460ºC, then mullite rhombic crystal lattice appears 960ºC. When reaches 1050ºC , ZrSiO 4 t-ZrO m-SiO phases formed coating. At 1400 º C, dioxide Experimental results can become basis for application ceramic -15Al, which improve properties composites an oxygen-containing environment elevated temperatures.