Al/BN可磨耗封严涂层镶嵌气泡产生原因分析
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摘要
Al/BN可磨耗封严涂层经湿式砂轮机切割后在浇注环氧树脂镶嵌时产生大量异常气泡,采用微观分析、硬度测试、验证试验等方法对气泡产生的原因进行了分析。结果表明:Al/NB可磨耗封严涂层为疏松结构,水基切削液容易被涂层的孔隙和裂缝吸附,从而与金属铝相发生电化学反应,最终在高黏度的环氧树脂中析出铝的氧化物,产生目视可见的气泡。
The Al/BN abradable seal coatings were cut by wet grinding wheel,and a large number of abnormal bubbles produced when pouring epoxy resin inlay.The causes for bubbles were analyzed by methods of micro analysis,hardness test,verifying test and so on.The results show that the Al/BN abradable seal coatings were porous structure.Water-based cutting fluids were easily adsorbed by the pores and cracks of the coatings,which resulted in electrochemical reactions with the metal aluminum phase.Finally,aluminum oxide was precipitated in high viscosity epoxy resin and produced visible bubbles.
The Al/BN abradable seal coatings were cut by wet grinding wheel,and a large number of abnormal bubbles produced when pouring epoxy resin inlay.The causes for bubbles were analyzed by methods of micro analysis,hardness test,verifying test and so on.The results show that the Al/BN abradable seal coatings were porous structure.Water-based cutting fluids were easily adsorbed by the pores and cracks of the coatings,which resulted in electrochemical reactions with the metal aluminum phase.Finally,aluminum oxide was precipitated in high viscosity epoxy resin and produced visible bubbles.
引文
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[2]肇国锋,袁福河,张佳平,等.一种等离子喷涂Al/BN封严涂层[J].热喷涂技术,2013,5(1):27-30.
[3]吴迪.等离子喷涂A1/BN可磨耗封严涂层孔隙状况超声表征[D].大连:大连理工大学,2013.
[4]易茂中,黄伯云,何家文,等.可磨耗封严涂层的冲蚀磨损特性及模型[J].航空学报,1998,19(5):35-41.
[5]FIRESTEIN K L,CORTHAY S,STEINMAN A E,et al.High-strength aluminum-based composites reinforced with BN,AlB2and AlN particles fabricated via reactive spark plasma sintering of Al-BN powder mixtures[J].Materials Science&Engineering:A,2017,681:1-9.
[6]刘洲,孙兰佳,肖丽宇.注水管内涂层系统检验与评价方法[J].理化检验(物理分册),2016,52(1):32-35.
[7]韩素珍,张建峰,洪晟,等.箔片动压气体轴承系统中箔片表面涂层材料的测试表征[J],理化检验(物理分册),2016,52(4):227-230.
[8]FARAOUN H I,GROSDIDIER T,SEICHEPINE JL,et al.Improvement of thermally sprayed abradable coating by microstructure control[J].Surface&Coatings Technology,2006,201(6):2303-2312.
[9]张俊红,鲁鑫,何振鹏,等.航空发动机可磨耗封严涂层技术研究及性能评价[J].材料工程,2016,44(4):94-109.
[10]尹春雷,陈美英,占佳,等.可磨耗封严涂层研究进展[J].航空制造技术,2008(20):92-94.
[11]田晔,张淑婷,马江虹,等.可磨耗封严涂层发展与应用[J],有色金属(冶炼部分),2006(增刊1):96-99.
[12]黄志锋,褚胜林,张灵芝,等.真空浸渍树脂法制备烧结金属材料金相样品[J].理化检验(物理分册),2007,43(10):509-511.
[13]于方丽,白宇,吴秀英,等.等离子喷涂镍基可磨耗封严涂层抗腐蚀及耐磨性能分析[J].无机材料学报,2016,31(7):687-693.
[14]夏广春.切削液对加工性能影响的试验研究[D].大连:大连理工大学,2013.
[15]ZHANG W L,YI M D,XIAO G C.Al2O3-coated h-BN composite powders and as-prepared Si3N4-based self-lubricating ceramic cutting tool material[J].International Journal of Refractory Metals&Hard Materials,2018,71(1):2-3.
[16]胡博,王建朝,刘影,等.铝合金在碱性环境中的耐腐蚀研究进展[J].电镀与环保,2014,34(3):4-6.
[17]XU C G,DU L Z,ZHANG W G,et al.Salt spray corrosion of Ni/Graphite abradable sealing coatings[J].Journal of Aeronautical Materials,2010,30(4):53-58.