Ni-W-P-Al_2O_3复合镀层的制备与抗高温氧化性能
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摘要
采用直流电沉积技术制备了Ni-W-P-Al_2O_3复合镀层,通过控制镀液中Al_2O_3颗粒的质量浓度及颗粒的粒径,研究了Al_2O_3颗粒对复合镀层表面微观形貌、镀层厚度及抗高温氧化性的影响,并对复合镀层的附着力强度进行了测试.结果表明:通过控制镀液中Al_2O_3颗粒的质量浓度可以获得不同成分的复合镀层;一定质量浓度的Al_2O_3颗粒可以细化Ni-W-P合金镀层的胞状组织,并且纳米颗粒对镀层的细化效果明显优于微米颗粒;Al_2O_3颗粒的质量分数和尺寸对Ni-W-P-Al_2O_3复合镀层的厚度有明显的影响;镀液中Al_2O_3颗粒的质量浓度为15g/L时所得镀层的抗高温氧化性最好;镀层附着力达到1级标准,Ni-W-P合金复合镀层与基体结合良好.
Ni-W-P-Al_2O_3 composite coating was prepared with DC electro deposition technique,the effect of Al_2O_3 particles on surface microscopic morphology,thickness,and high-temperature oxidation resistance of composite coating was investigated through controlling the mass concentration and size of the Al_2O_3 particles in plating bath,and the bonding strength of the composite coating was tested.The result showed that composite coatings with different components could be obtained through controlling the mass concentration and size of Al_2O_3 particles in plating bath.Al_2O_3 particles with certain mass concentration would be able to refine the cellular microstructure of Ni-W-P alloy coating and the refining result of nanoAl_2O_3 particles would obviously be superior to that of micro-Al_2O_3 particles.The mass-fraction and size of Al_2O_3 particles would have a remarkable effect on the thickness of Ni-W-P-Al_2O_3 composite coating.The high-temperature oxidation resistance of coating obtained would be the best when the mass concentration of Al_2O_3 particles in plating bath was 15g/L,the coating adhesion strength would reach first-class standard,and the bonding of Ni-W-P alloy coating to the matrix would be fine.
Ni-W-P-Al_2O_3 composite coating was prepared with DC electro deposition technique,the effect of Al_2O_3 particles on surface microscopic morphology,thickness,and high-temperature oxidation resistance of composite coating was investigated through controlling the mass concentration and size of the Al_2O_3 particles in plating bath,and the bonding strength of the composite coating was tested.The result showed that composite coatings with different components could be obtained through controlling the mass concentration and size of Al_2O_3 particles in plating bath.Al_2O_3 particles with certain mass concentration would be able to refine the cellular microstructure of Ni-W-P alloy coating and the refining result of nanoAl_2O_3 particles would obviously be superior to that of micro-Al_2O_3 particles.The mass-fraction and size of Al_2O_3 particles would have a remarkable effect on the thickness of Ni-W-P-Al_2O_3 composite coating.The high-temperature oxidation resistance of coating obtained would be the best when the mass concentration of Al_2O_3 particles in plating bath was 15g/L,the coating adhesion strength would reach first-class standard,and the bonding of Ni-W-P alloy coating to the matrix would be fine.
引文
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[7]WANG W Y,YANG S J,QIAO Z Q,et al.Preparation of NiW-P-B amorphous catalyst for the hydrodeoxygenation of p-cresol[J].Catalysis Communications,2015,60(4):50-54.
[8]周永莉,赵卫民,王兴强.硫酸镍浓度对脉冲电沉积Ni-W-P合金的影响[J].材料保护,2015,48(2):8-10.
[9]BALARAJU J N,KALAVATI,MANIKANDANATH N T,et al.Phase transformation behavior of nanocrystalline Ni-W-P alloys containing various W and P contents[J].Surface&Coatings Technology,2012,206(10):2682-2689.
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[12]邹勇进,肖作安,费锡明,等.Ni-W-TiO2复合镀工艺及其镀层性能研究[J].材料保护,2004,37(12):24-26.
[13]SEN R,DAS S,DAS K.Synthesis and properties of pulse electrodeposited Ni-CeO2 nano composite[J].Metallurgical&Materials Transactions A,2012,43(10):3809-3823.
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[16]陈天玉.复合镀镍和特种镀镍[M].北京:化学工业出版社,2008.
[17]吴化,李雪松,刘云旭,等.耐磨Ni-Al2O3复合镀层组成机理及性能研究[J].表面技术,2004,33(6):28-30.