| About this Abstract |
| Meeting |
Materials Science & Technology 2011
|
| Symposium
|
Advanced Protective Coatings for Refractory Metals and Alloys
|
| Presentation Title |
Phase Formation and Oxidation Resistance of Mo-Si-B Alloys |
| Author(s) |
Kyosuke Yoshimi, Seong-Ho Ha, Kouichi Maruyama, Naoyuki Nomura, Shuji Hanada |
| On-Site Speaker (Planned) |
Kyosuke Yoshimi |
| Abstract Scope |
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. |
| Proceedings Inclusion? |
Definite: A CD-only volume |