Reactive Plasma Spraying of Fine Al2O3/AlN Feedstock Powder
Reactive Plasma Spraying of Fine Al2O3/AlN Feedstock Powder
复制标题
细Al2O3/AlN原料粉末的反应等离子喷涂
DOI：
10.1007/s11666-013-9992-x
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发表时间：
2013
影响因子：
3.1
通讯作者：
M. Fukumoto
中科院分区：
文献类型：
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作者：
M. Shahien;M. Yamada;T. Yasui;M. Fukumoto
反应等离子喷涂 (RPS) 是一种很有前途的原位形成氮化铝 (AlN) 涂层的技术。最近，通过在 N2/H2 热等离子体中对氧化铝 (Al2O3) 粉末进行 RPS 制备了 AlN 基涂层。本研究研究了精细 Al2O3/AlN 混合物 RPS 的可行性以及等离子气体（N2、H2）对氮化转化以及涂层微观结构和性能的影响。成功制备了高氮化物含量的厚AlN/Al2O3涂层。涂层由h-AlN、c-AlN、Al5O6N、γ-Al2O3和少量α-Al2O3组成。细颗粒的使用通过增加表面积来增强氮化转化率和熔化倾向。此外，AlN添加剂提高了涂层中AlN的含量。增加N 2 气体流量提高了氮化物含量并促进h-AlN相的完全晶体生长，并增加了涂层厚度。另一方面，虽然Al2O3颗粒的等离子氮化需要H2气体，但增加其流量会降低氮化物含量和涂层厚度。在细颗粒的 RPS 过程中观察到等离子气体对涂层成分、微观结构和性能的显着影响。
Reactive plasma spraying (RPS) is a promising technology for in situ formation of aluminum nitride (AlN) coatings. Recently, AlN-based coatings were fabricated by RPS of alumina (Al2O3) powder in N2/H2thermal plasma. This study investigated the feasibility of RPS of a fine Al2O3/AlN mixture and the influence of the plasma gases (N2, H2) on the nitriding conversion, and coating microstructure and properties. Thick AlN/Al2O3coatings with high nitride content were successfully fabricated. The coatings consist ofh-AlN,c-AlN, Al5O6N, γ-Al2O3, and a small amount of α-Al2O3. Use of fine particles enhanced the nitriding conversion and the melting tendency by increasing the surface area. Furthermore, the AlN additive improved the AlN content in the coatings. Increasing the N2gas flow rate improved the nitride content and complete crystal growth to theh-AlN phase, and enhanced the coating thickness. On the other hand, though the H2gas is required for plasma nitriding of the Al2O3particles, increasing its flow rate decreased the nitride content and the coating thickness. Remarkable influence of the plasma gases on the coating composition, microstructure, and properties was observed during RPS of the fine particles.
铝粉反应性大气等离子喷涂渗氮制备 A1N 涂层
DOI：
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发表时间：
2010
期刊：
Materials Transactions 51-55(In press)
影响因子：
--
作者：
Shingo KAWARA;Hiroyuki KOUSAKA;et.al.;M.Shahien
通讯作者：
M.Shahien
反应性大气等离子喷涂AlN涂层：铝原料粒度的影响
DOI：
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发表时间：
2011
期刊：
Journal of Thermal Spray Technology Vol.20, No.3
影响因子：
--
作者：
M.Shahien;M.Yamada;T.Yasui;M.Fukumoto
通讯作者：
M.Fukumoto