(1. 南京工程學院 江蘇省先進結(jié)構(gòu)材料及應(yīng)用技術(shù)重點實驗室，南京 211167；
2. 南京工程學院 材料工程學院，南京 211167)
摘 要: 采用雙脈沖復(fù)合電鍍技術(shù)，在瓦特型鍍液中，制備了含微/納米SiC顆粒的Ni基復(fù)合鍍層，研究鍍液中納米SiC添加量對復(fù)合鍍層微觀形貌、摩擦性能和抗氧化性能的影響。結(jié)果表明：在SiC顆粒(5 μm)濃度為10 g/L的鍍液中，添加納米SiC和Ni-SiC復(fù)合鍍層鎳擇優(yōu)取向由晶面(200)轉(zhuǎn)變?yōu)榫?111)；當SiC(40 μm )濃度為4.0 g/L時，復(fù)合鍍層顯微硬度最大，為456 HV；復(fù)合鍍層摩擦因數(shù)最小，平均值為0.28，為微米復(fù)合鍍層的1/2；經(jīng)900 ℃氧化100 h后，氧化質(zhì)量增加為6.025 mg/cm2，為微米復(fù)合鍍層的1/3。
關(guān)鍵字: Ni-SiC復(fù)合鍍層；微米SiC；耐磨；抗氧化性能
（1. Key Laboratory of Advanced Structural Materials and Application Technology of Jiangsu Province,
Nanjing Institute of Technology, Nanjing 211167, China;
2. School of Materials Engineering, Nanjing Institute of Technology, Nanjing 211167, China）
Abstract:Ni based composite coatings containing micro- and nano-SiC particles were prepared by dipulse electrodepositing in watts nickel solution. The effect of the nano-SiC content in the solution on the micro morphology, wear and oxidation resistance of the coating was investigated. The results show that the preferred orientation the Ni crystallites transits from (200) crystal face to (111) crystal face of Ni-SiC composite coatings when adding nano-SiC in electrolyte with SiC (5 μm) content of 10 g/L. the maximum value of microhardness of coating with 456 HV is obtained, and the smallest coefficient of coating with 0.28 is about 1/2 than that of micro-SiC composite coating when adding 4.0 g/L nano-SiC in electrolyte, and shows the best oxidation resistance with the mass gain of 6.025 mg/cm2 is about 1/3 than that of micro-SiC composite coating after oxidation at 900 ℃ for 100 h.
Key words: Ni-SiC composite coating; micro-SiC; wear resistance; oxidation resistance property
