Synthesis and microstructure observation of titanium carbonitride nanostructured coatings using reactive plasma spraying in atmosphere
Synthesis and microstructure observation of titanium carbonitride nanostructured coatings using reactive plasma spraying in atmosphere
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DOI：
10.1016/j.apsusc.2011.05.056
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发表时间：
2011-08
影响因子：
6.7
通讯作者：
Lin Zhu;Jining He;Dian-ran Yan;Lisong Xiao;Yan-chun Dong;Jianxin Zhang;H. Liao
中科院分区：
文献类型：
--
作者：
Lin Zhu;Jining He;Dian-ran Yan;Lisong Xiao;Yan-chun Dong;Jianxin Zhang;H. Liao
在本研究中，纳米结构的碳氮化钛（TiCN）涂层成功地沉积反应等离子喷涂（RPS）技术使用一个自行设计的气体隧道安装在一个正常的等离子体喷枪。采用XRD、SEM和TEM对TiCN涂层的相组成和显微结构进行了表征。结果表明，涂层的主相为FCC TiC 0. 2N 0. 8，并含有少量的Ti 3 O。使用35 kW沉积的涂层显示出更好的组织和性能。透射电镜观察表明，涂层具有典型的纳米结构，包括直径为90 nm的等轴晶和400 nm长的柱状晶。SEM观察进一步揭示了TEM图像中平行于基体表面的等轴晶实际上是垂直于基体表面的柱状晶。并对纳米结构涂层的形成机理进行了探讨。测得的涂层的显微硬度值约为1659 Hv 100 g，计算出的裂纹扩展力约为34.9 J/m2。
In the present study, nanostructured titanium carbonitride (TiCN) coatings were successfully deposited by reactive plasma spraying (RPS) technology using a self-designed gas tunnel mounted on a normal plasma spray torch. The phase composition and microstructure of the TiCN coatings were characterised by XRD, SEM and TEM. The results indicated that the main phase of the coatings was FCC TiC0.2N0.8with a small amount of Ti3O. The coating that was deposited using 35 kW displayed better microstructure and properties. The coating exhibited a typical nanostructure including 90 nm diamertrical equiaxed grains and 400 nm long columnar grains by TEM images. The SEM observation further revealed that the equiaxed grains in parallel direction to the substrate surface in TEM images were actually the columnar grains perpendicular to the substrate surface. The formation mechanism of the nanostructured coatings was also discussed. The measured microhardness value of the coating was approximately 1659 Hv100 g, and the calculated crack extension force was about 34.9 J/m2.