以往,有关等离子喷涂CrO_3-8%TiO_2 涂层厚度与涂层性能关系的报道较少,为此,通过优化工艺参数,在45钢表面等离子喷涂不同厚度(350,450,550μm)的Cr_2O_3-8%TiO_2涂层,研究了涂层厚度与其结合强度、硬度和孔隙率之间的关系.涂层厚度为350,450,550μm时,结合强度分别为29.2,11.5,7.2 MPa,显微硬度分别为2 528,2 190,1 930 HV;孔隙率分别为3.80%,3.95%,4.45%.结果表明,随Cr_2O_3-8%TiO_2 喷涂层厚度的增加,涂层的结合强度减小,孔隙率增加,造成显微硬度降低.
A series of Cr_2O_3-8% TiO_2 coatings with different thickness (350,450,550μm) were prepared on 45 steel substrate by plasma spraying under optimized parametens. The correlation among the thickness and properties of the ooatings were investigated. Results indicate that the plasma sprayed ceramic coatings with a thickness of 350, 450μm and 550μm have a bonding strength of 29.2, 11.5 MPa and 7.2 MPa, a micro-hardness of 2 528, 2 190 HV and 1 930 HV, and a porosity of 3.80 %, 3.95 % and 4.45 %. This means that the porosity of the plasma sprayed ceramic coatings increases with increasing thickness, while the bonding strength and microhardness of the coatings decrease therewith.
参考文献
| [1] | 邓世均.热喷涂高性能陶瓷涂层[J].材料保护,1999(01):31-33. |
| [2] | R. T. R. McGrann;D. J. Greving;J. R. Shadley;E. F. Rybicki;T. L. Kruecke;B. E. Bodger .The effect of coating residual stress on the fatigue life of thermal spraycoated steel and aluminum[J].Surface & Coatings Technology,1998(1/3):59-64. |
| [3] | 陈进武,李强,张玉叶,吴敏生.电弧超声改善等离子喷涂纳米结构ZrO2涂层结合强度研究[J].热加工工艺,2008(03):87-89. |
| [4] | 王德朋,于朝霞,王旭东,梁仕军,张文建,冯宗杰,穆洪彬.喷涂距离对热障涂层拉伸强度的影响[J].热加工工艺,2007(07):47-49. |
| [5] | 陈汉存;刘正义;庄育智 .SiO_2添加剂对等离子喷涂ZrO_2涂层结构和性能的影响[J].材料研究学报,1992,6(02):146-151. |
| [6] | 邸英浩,阎殿然,张建新,何继宁,李晓亮.等离子喷涂纳米结构Al2O3/TiO2涂层的组织与性能研究[J].热加工工艺,2005(02):10-11,15. |
| [7] | Higuera V;Belzunce FJ;Riba J .Influence of the thermal-spray procedure on the properties of a CoNiCrAlY coating[J].Surface & Coatings Technology,2006(18/19):5550-5556. |
| [8] | 段忠清,王泽华.等离子喷涂NiCrAl黏结涂层工艺优化研究[J].新技术新工艺,2008(05):80-82. |
| [9] | 段忠清,张宝霞,王泽华.等离子喷涂Cr2O3-8%TiO2涂层参数优化研究[J].表面技术,2008(04):39-41,53. |
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