碳含量对反应等离子喷涂TiCN涂层的影响
|
摘要
以廉价Ti粉和碳黑为原始粉末,采用喷涂造粒制备Ti-C团聚复合喷涂材料,并通过反应等离子喷涂在氮气气氛下合成TiCN涂层.使用X射线衍射仪(XRD)、扫描电子显微镜(SEM)及显微硬度计对涂层进行表征,探讨了碳含量(14.3%,16.7%及20%)对TiCN涂层物相组成、显微结构及显微硬度的影响.结果表明:所制备的涂层均由Ti C0.2N0.8和少量钛的氧化物组成,随着碳含量的增加,钛的氧化物含量降低.涂层为典型层状结构,存在少量裂纹及孔洞,当碳含量为20%时,制备的涂层相对致密,缺陷最少.此外,涂层由细小等轴晶和柱状晶组成,当碳含量为20%时,制备的涂层平均显微硬度最高,为(1 589±98.7)Hv0.2,这是晶粒细化和显微结构致密的结果.
An agglomerated Ti-C feedstock for reactive spraying prepared by spraying granulation with cheap Ti powder and black carbon as raw powder. TiCN coatings were fabricated by reactive plasma spraying(RPS) with N2. The effects of carbon content(14.3%, 16.7% and 20%) on phase composition, microstructure and Vickers microhardness of coatings were investigated by X-ray diffraction(XRD), scanning electron microscope(SEM) and Vickers Microhardness Tester. The results showed that all the coatings consisted of TiC_(0.2)N_(0.8) and minor titanium oxides, and the amount of titanium oxides decreased with the increasing carbon content. All the coatings possessed a typical laminated structure with some defects(cracks and pores), and a relatively dense microstructure was obtained when the carbon content was 20%.In addition, the plasma sprayed TiCN coatings were composed of numerous fine equiaxed crystal and columnar crystal.The microhardness of coating sprayed with carbon content of 20% was(1 589±98.7) Hv0.2, which was the highest among these three coatings. This was attributed to the dense microstructure and refinement of grain size.
An agglomerated Ti-C feedstock for reactive spraying prepared by spraying granulation with cheap Ti powder and black carbon as raw powder. TiCN coatings were fabricated by reactive plasma spraying(RPS) with N2. The effects of carbon content(14.3%, 16.7% and 20%) on phase composition, microstructure and Vickers microhardness of coatings were investigated by X-ray diffraction(XRD), scanning electron microscope(SEM) and Vickers Microhardness Tester. The results showed that all the coatings consisted of TiC_(0.2)N_(0.8) and minor titanium oxides, and the amount of titanium oxides decreased with the increasing carbon content. All the coatings possessed a typical laminated structure with some defects(cracks and pores), and a relatively dense microstructure was obtained when the carbon content was 20%.In addition, the plasma sprayed TiCN coatings were composed of numerous fine equiaxed crystal and columnar crystal.The microhardness of coating sprayed with carbon content of 20% was(1 589±98.7) Hv0.2, which was the highest among these three coatings. This was attributed to the dense microstructure and refinement of grain size.
引文
[1]刘扬,耿振,孙有亮,等.氮气流量对反应氮弧熔覆Ti CN/Fe涂层组织和性能的影响[J].河北农业大学学报,2014,37(1):114-117.
[2]Chen R,Tu J P,Liu D G,et al.Microstructure,mechanical and tribological properties of Ti CN nanocomposite films deposited by DC magnetron sputtering[J].Surface&Coatings Technology,2011,205:5228-5234.
[3]Shan L,Wang Y X,Li J L,et al.Tribological behaviors of PVD Ti N and Ti CN coatings in artificial seawater[J].Surface&Coatings Technology,2013,226:40-50.
[4]Schneider J M,Voevodin A,Rebhoz C,et al.X-Ray diffraction investigations of magnetron sputtered Ti CN coatings[J].Surface&Coatings Technology,1995,74-75:312-319.
[5]Kong D J,Wang J C,Guo H Y,et al.SEM-EDS plane scan and line scan analysis of Ti CN coatings by cathodic arc ion plating[J].Rare Metal Materials and Engineering,2015,22(4):3000-3004.
[6]米靖.物理气相沉积技术在冰刀上的应用[J].金属热处理,2014,4(39):132-134
[7]陈海龙,杨晖.反应等离子喷涂Ti N的反应过程及涂层形成机理研究[J].材料热处理技术,2009,20(38):104-106.
[8]马静,胡建文,阎冬青,等.反应等离子喷涂功率对Ti CN涂层性能的影响[J].材料保护,45(9):52-55.
[9]姚燚红,王泽华,周泽华,等.反应等离子喷涂技术的研究进展[J].机械工程材料,2011,35(12):1-5.
[10]闫华,王爱华,熊钊颋,等.自蔓延反应喷涂技术最新研究及进展[J].材料导报,2009,23(7):91-94.
[11]赵利军.反应等离子喷涂Ti CN涂层制备及其性能的研究[D].天津:河北工业大学,2013.
[12]张守全,朱警雷,王海涛,等.反应等离子喷涂制备原位Ti C颗粒增强Fe基金属陶瓷涂层[J].北京科技大学学报,2009,31(3):376-387.
[13]齐文艳,叶芳,傅思伟,等.反应等离子喷涂结晶规律的研究[J].陶瓷学报,2017,38(1):47-52.
[14]Feng W R,Yan D R,He J N,et al.Reactive plasma sprayed Ti N coating and its tribological properties[J].Wear,2005,258:806-811.
[2]Chen R,Tu J P,Liu D G,et al.Microstructure,mechanical and tribological properties of Ti CN nanocomposite films deposited by DC magnetron sputtering[J].Surface&Coatings Technology,2011,205:5228-5234.
[3]Shan L,Wang Y X,Li J L,et al.Tribological behaviors of PVD Ti N and Ti CN coatings in artificial seawater[J].Surface&Coatings Technology,2013,226:40-50.
[4]Schneider J M,Voevodin A,Rebhoz C,et al.X-Ray diffraction investigations of magnetron sputtered Ti CN coatings[J].Surface&Coatings Technology,1995,74-75:312-319.
[5]Kong D J,Wang J C,Guo H Y,et al.SEM-EDS plane scan and line scan analysis of Ti CN coatings by cathodic arc ion plating[J].Rare Metal Materials and Engineering,2015,22(4):3000-3004.
[6]米靖.物理气相沉积技术在冰刀上的应用[J].金属热处理,2014,4(39):132-134
[7]陈海龙,杨晖.反应等离子喷涂Ti N的反应过程及涂层形成机理研究[J].材料热处理技术,2009,20(38):104-106.
[8]马静,胡建文,阎冬青,等.反应等离子喷涂功率对Ti CN涂层性能的影响[J].材料保护,45(9):52-55.
[9]姚燚红,王泽华,周泽华,等.反应等离子喷涂技术的研究进展[J].机械工程材料,2011,35(12):1-5.
[10]闫华,王爱华,熊钊颋,等.自蔓延反应喷涂技术最新研究及进展[J].材料导报,2009,23(7):91-94.
[11]赵利军.反应等离子喷涂Ti CN涂层制备及其性能的研究[D].天津:河北工业大学,2013.
[12]张守全,朱警雷,王海涛,等.反应等离子喷涂制备原位Ti C颗粒增强Fe基金属陶瓷涂层[J].北京科技大学学报,2009,31(3):376-387.
[13]齐文艳,叶芳,傅思伟,等.反应等离子喷涂结晶规律的研究[J].陶瓷学报,2017,38(1):47-52.
[14]Feng W R,Yan D R,He J N,et al.Reactive plasma sprayed Ti N coating and its tribological properties[J].Wear,2005,258:806-811.