汽车发动机用ZL114合金表面涂层制备与性能研究
|
摘要
以Cr作为中间过渡层,采用磁控溅射的方法在ZL114合金表面制备了类金刚石(DLC)硬质涂层,对比分析了母材与涂层的硬度、耐蚀性能和干/湿摩擦学性能。结果表明:在ZL114合金表面制备了Cr过渡层厚度约为2μm、表面DLC涂层约为10μm的Cr-DLC涂层;Cr-DLC涂层具有DLC薄膜的特性,显微硬度和纳米硬度分别为母材的3.73倍和3.96倍;Cr-DLC涂层的腐蚀倾向和腐蚀速率都要小于ZL114合金母材,ZL114合金表面沉积Cr-DLC涂层后耐腐蚀性能得到提高;母材和Cr-DLC涂层在湿摩擦条件下的摩擦系数和磨损率低于干摩擦条件下,且干/湿摩擦条件下Cr-DLC涂层的磨损率都要低于ZL114合金母材;Cr-DLC涂层在湿摩擦(3.5%NaCl溶液)条件下仍然具有较好的耐磨性。
The diamond-like carbon(DLC) coating were synthesized by magnetron co-sputtering on the ZL114 A-alloy substrate,an advanced car engine material and covered with Cr-transition layer.The influence of the Cr-transition layer and DLC thickness on the microstructures and tribological properties was investigated with scanning electron microscopy,X-ray photoelectron spectroscopy,Raman spectroscopy,electrochemical workstation and conventional mechanical probes.The preliminary results show that the Cr-transition layer has a major impact.To be specific,the compact Cr(2 μm)/DLC(10 μm) coatings increased the micro-/nano-hardness of ZL114 A-alloy to 3.73 times/3.96 times,respectively,and significantly decreased the wear-rate,corrosion-rate and friction coefficient.Under the dry/wet friction conditions,the wear-resistance of the Cr-DLC coatings,higher than that of ZL114 A alloy,was high enough in wet friction of 3.5% NaCl solution.We suggest that the DLC coatings be of some technological interest in fabrication of car engine with ZL114 A alloy.
The diamond-like carbon(DLC) coating were synthesized by magnetron co-sputtering on the ZL114 A-alloy substrate,an advanced car engine material and covered with Cr-transition layer.The influence of the Cr-transition layer and DLC thickness on the microstructures and tribological properties was investigated with scanning electron microscopy,X-ray photoelectron spectroscopy,Raman spectroscopy,electrochemical workstation and conventional mechanical probes.The preliminary results show that the Cr-transition layer has a major impact.To be specific,the compact Cr(2 μm)/DLC(10 μm) coatings increased the micro-/nano-hardness of ZL114 A-alloy to 3.73 times/3.96 times,respectively,and significantly decreased the wear-rate,corrosion-rate and friction coefficient.Under the dry/wet friction conditions,the wear-resistance of the Cr-DLC coatings,higher than that of ZL114 A alloy,was high enough in wet friction of 3.5% NaCl solution.We suggest that the DLC coatings be of some technological interest in fabrication of car engine with ZL114 A alloy.
引文
[1] 杜忠泽,芮星,王强,等.铝合金汽车发动机缸体内壁表面改性的研究进展[J].材料导报,2018(S1):336-340
[2] 韩文静.我国汽车部件等离子喷涂涂层研究及应用进展[J].电镀与精饰,2017,39(05):18-24
[3] 宋飞,肖方明.汽车发动机用AZ91D合金的表面改性设计与性能研究[J].热加工工艺,2017,46(22):184-188
[4] 曾晓彤.汽车发动机用AZ91合金表面喷涂与性能研究[J].铸造技术,2018,39(01):198-201
[5] 陈美容,曾宪光,孙德恩,等.Zr掺杂类金刚石薄膜摩擦性能及耐腐蚀性能的影响[J].表面技术,2017,46(06):138-142
[6] 王玲,张洁,李林枝,等.AISI 316L不锈钢表面沉积Ti掺杂类金刚石薄膜及其性能[J].材料保护,2017,50(06):37-39+43
[7] 李振东,詹华,王亦奇,等.干摩擦条件下基体粗糙度对Cr-DLC薄膜摩擦磨损性能的影响[J].摩擦学学报,2016,36(06):741-748
[8] 李晓娟,刘栋,刘哲,等.海洋环境中铝合金表面改性涂层的电化学性能[J].表面技术,2018,47(01):181-185
[9] Niknahad M,Moradian S,Mirabedini S M.The Adhesion Properties and Corrosion Performance of Differently Pretreated Epoxy Coatings on an Aluminium Alloy[J].Corrosion Science,2010,52(6):1948-1957
[10] 郗宏勋,宁建华,海争平.汽车发动机缸体的表面改性行为研究[J].铸造技术,2016,37(08):1632-1635+1649
[11] 孙塬,马慧娟,顾艳红,等.ZL114铝合金微弧氧化涂层的耐磨性能[J].材料保护,2017,50(10):1-4
[12] 符蓉,高飞,牟超,等.铜基复合材料干湿条件下的摩擦学行为[J].复合材料学报,2010,27(1):79-85
[2] 韩文静.我国汽车部件等离子喷涂涂层研究及应用进展[J].电镀与精饰,2017,39(05):18-24
[3] 宋飞,肖方明.汽车发动机用AZ91D合金的表面改性设计与性能研究[J].热加工工艺,2017,46(22):184-188
[4] 曾晓彤.汽车发动机用AZ91合金表面喷涂与性能研究[J].铸造技术,2018,39(01):198-201
[5] 陈美容,曾宪光,孙德恩,等.Zr掺杂类金刚石薄膜摩擦性能及耐腐蚀性能的影响[J].表面技术,2017,46(06):138-142
[6] 王玲,张洁,李林枝,等.AISI 316L不锈钢表面沉积Ti掺杂类金刚石薄膜及其性能[J].材料保护,2017,50(06):37-39+43
[7] 李振东,詹华,王亦奇,等.干摩擦条件下基体粗糙度对Cr-DLC薄膜摩擦磨损性能的影响[J].摩擦学学报,2016,36(06):741-748
[8] 李晓娟,刘栋,刘哲,等.海洋环境中铝合金表面改性涂层的电化学性能[J].表面技术,2018,47(01):181-185
[9] Niknahad M,Moradian S,Mirabedini S M.The Adhesion Properties and Corrosion Performance of Differently Pretreated Epoxy Coatings on an Aluminium Alloy[J].Corrosion Science,2010,52(6):1948-1957
[10] 郗宏勋,宁建华,海争平.汽车发动机缸体的表面改性行为研究[J].铸造技术,2016,37(08):1632-1635+1649
[11] 孙塬,马慧娟,顾艳红,等.ZL114铝合金微弧氧化涂层的耐磨性能[J].材料保护,2017,50(10):1-4
[12] 符蓉,高飞,牟超,等.铜基复合材料干湿条件下的摩擦学行为[J].复合材料学报,2010,27(1):79-85