|About this Abstract
||Materials Science & Technology 2011
||Advanced Protective Coatings for Refractory Metals and Alloys
||Phase Formation and Oxidation Resistance of Mo-Si-B Alloys
||Kyosuke Yoshimi, Seong-Ho Ha, Kouichi Maruyama, Naoyuki Nomura, Shuji Hanada
|On-Site Speaker (Planned)
In this paper, our achievement on the phase formation and stability and oxidation resistance of Mo-rich Mo-Si-B alloys is reviewed. In the Mo-rich side of the Mo-Si-B ternary system, there are some eutectic reaction points in the liquidus projection. The solidification pathways suggest the possibility for amorphous and/or nanocrystalline structure formation during rapid solidification. Mo-Si-B amorphous phase and Mo3Si-Mo5Si3-Mo5SiB2 nanocrystalline structure formation was confirmed in the entire coating produced by low-pressure plasma spraying using Mo3Si-Mo5Si3-Mo5SiB2 multiphase powder, by which coating materials are rapidly solidified on substrate. The oxidation resistance of the plasma-sprayed coating was much better than that of the bulk sample produced by arc-melting and annealing. Therefore, the oxidation resistance of Mo-Si-B coatings is improvable by rapid solidification processes through amorphous phase and nanocrystalline structure formation relevant to the eutectic reactions.
||Definite: A CD-only volume