Microstructures and mechanical properties of duplex-treated composite ceramic coatings with and without compound layer
Microstructures and mechanical properties of duplex-treated composite ceramic coatings with and without compound layer
复制标题
具有和不具有化合物层的双相处理复合陶瓷涂层的微观结构和力学性能
DOI：
10.1016/j.ceramint.2014.10.074
复制
发表时间：
2015-03
影响因子：
5.2
通讯作者：
Wanglin Chen
中科院分区：
文献类型：
--
作者：
Sik-Chol Kwon;Mingxi Li;Shuyuan Liu;Wanglin Chen
采用等离子氮碳共渗和后续多弧离子镀相结合的方法制备了复合陶瓷涂层。利用X射线衍射仪、X射线光电子能谱、扫描电子显微镜和透射电子显微镜对陶瓷涂层的组织结构和力学性能进行了研究，并对涂层的性能进行了表征。结果表明，复合陶瓷涂层由内层氮碳共渗层、CrN中间层和最外层AlCrTiSiN层组成。AlCrTiSiN层主要由纳米尺度的(Cr，Al)N亚层和非晶亚层组成，少量(Ti，Al)N相嵌入在非晶态Si3N4和Si的基质中。复合层转变为γ‘相亚层，大大提高了过渡层与复合层的结合强度。粘结强度的提高归因于γ‘相作为CrN相外延生长的形核中心。与不含复合涂层的复合陶瓷涂层相比，含复合涂层的复合陶瓷涂层具有更高的硬度、承载能力和耐磨性。力学性能和摩擦学性能的改善与γ‘相亚层的存在有关，该亚层在基材和AlCrTiSiN涂层之间提供了平滑的过渡、硬度和应力梯度。另外，硬质γ‘相亚层对载荷作用下的CrN/AlCrTiSiN层具有很强的支撑作用。
Duplex-treated composite ceramic coatings with and without compound layer were produced by the combination of plasma nitrocarburizing and follow-up multi-arc ion plating. The microstructures and mechanical properties of the ceramic coatings were investigated by means of X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy, in association with property characterization. The results show that the composite ceramic coatings are composed of an inner nitrocarburized layer, a CrN interlayer and an outmost AlCrTiSiN layer. The AlCrTiSiN layer consists mainly of alternately nanoscaled (Cr,Al)N sublayer and amorphous sublayer with a few (Ti,Al)N phases embedded in a matrix of amorphous Si3N4and Si. The compound layer has transformed to the γ′-phase sublayer, which enhances considerably the adhesion strength of the CrN interlayer to compound layer. The improved adhesion strength is attributed to the γ′-phase acting as nucleation sites of epitaxial growth for the CrN phase. The composite ceramic coating with compound layer reveals much higher hardness, bearing capacity and wear resistance when compared with the composite ceramic coating without compound layer. The improvement of mechanical and tribological properties is associated with presence of the γ′-phase sublayer, which provides a smooth transition, gradient in hardness and stress between the substrate and the CrN/AlCrTiSiN coating. In addition, the hard γ′-phase sublayer provides a strong supporting effect for CrN/AlCrTiSiN layer under loading.
登录
查看更多内容
影响因子：
2.1
作者：
W. Baek;S. Kwon;J. Rha;B. Chae;Junehawk Lee
通讯作者：
W. Baek;S. Kwon;J. Rha;B. Chae;Junehawk Lee
氮碳共渗低碳钢脉状晶界显微组织的电子显微镜研究
DOI：
10.1016/j.jmst.2013.03.027
发表时间：
2013-06
期刊：
Journal of Materials Science & Technology
影响因子：
--
作者：
Chen, Wanglin;Wu, Cuilan;Chen, Jianghua;He, Aigui
通讯作者：
He, Aigui
影响因子：
5.2
作者：
I. Ebrahimzadeh;F. Ashrafizadeh
通讯作者：
I. Ebrahimzadeh;F. Ashrafizadeh
影响因子：
5.4
作者：
Shi Li;R. Manory;J. Hensler
通讯作者：
Shi Li;R. Manory;J. Hensler
影响因子：
5.4
作者：
D. Nolan;V. Leskovšek;M. Jenko
通讯作者：
D. Nolan;V. Leskovšek;M. Jenko