Mo含量对CrMoN/MoS_2复合涂层的组织结构及力学性能的影响（英文）  

Effect of Mo Content on the Structural and Mechanical Properties of CrMoN/MoS_2 Composite Coatings

作　　者：底月兰[1] 张平[1] 蔡志海[1] 杨臻[1] 李奇[1] 沈维[1] 

机构地区：[1]装甲兵工程学院,北京100072

出　　处：《稀有金属材料与工程》2014年第2期264-268,共5页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(50901089);National Key Laboratory for Remanufacturing under Grant(9140C850207100C8506)

摘　　要：通过对不同Mo含量的CrMoN复合涂层进行低温离子渗硫处理获得CrMoN/MoS2复合涂层,并对其组织结构及力学性能进行研究。扫描电镜分析显示出CrMoN复合涂层表面形貌比较致密,晶粒较大,而经过渗硫处理后的CrMoN/MoS2复合涂层呈现了疏松的颗粒状的形貌。由于渗硫过程是非反应成核扩散过程,期间没有发生择优生长,故晶粒尺寸受到抑制。对渗硫过程中可能发生的反应进行热力学计算,推断复合涂层中的Mo单质和MoNx均可与S元素发生反应生成MoS2,通过对CrMoN/MoS2复合涂层表面元素的化合价态进行分析,可知MoS2主要来源于MoNx与S发生的置换反应。纳米硬度测试结果表明,渗硫处理后的CrMoN复合涂层的纳米硬度和弹性模量都得到提高,力学性能得到提升。CrMoN/MoS2 composite coatings were prepared on the surfaces of the CrMoN composite coatings with different Mo contents by means of a low temperature ion sulfurizing process. The structural and mechanical properties of these coatings as a func- tion of Mo content have been studied. SEM analysis shows that the CrMoN coating reveals a dense and compact surface structure, the CrMoN/MoS2 composite coatings display loose grain structures; In the sulfurizing process, a preferential growth does not happen, the sulfide size is inhibited, The products of the reaction between MoNx and S are the main origin of MoS2.Nanoindentation test shows that the hardness and Young＇s modulus of CrMoN/MoS2 coatings are higher than that of CrMoN composite coatings.

关 键 词：CrMoN MoS2复合涂层 组织结构 力学性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]