阴极等离子电解大面积沉积弥散Pt微粒增韧8YSZ热障涂层
发布时间：2018-10-05 08:42
【摘要】：采用大气等离子喷涂(APS)在高温合金表面制备一层Ni Co Cr Al Y粘结层,然后采用阴极等离子电解沉积(CPED)制备一层弥散Pt微粒的8YSZ涂层。通过在电解液中加入陶瓷微珠,促使阴极表面发生均匀的等离子微弧放电,实现了在大面积样品上沉积8YSZ涂层。获得的涂层厚度到达120μm,具有多孔结构,由立方相和四方相8YSZ以及Pt组成。1100℃空气中循环氧化的结果表明,随着涂层中Pt含量的的增加,涂层的抗高温氧化和抗剥落性能得到明显提高。Pt微粒对8YSZ涂层的增韧作用主要为:Pt微粒塑性变形吸收裂纹扩展的能量,钝化裂纹尖端,减小裂纹尺寸,提高涂层的临界断裂应力。
[Abstract]:A layer of Ni Co Cr Al Y bonding layer was prepared on the surface of superalloy by atmospheric plasma sprayed (APS), and then a layer of 8YSZ coating with dispersed Pt particles was prepared by cathodic plasma electrodeposition of (CPED). By adding ceramic beads into the electrolyte, uniform plasma arc discharge occurred on the cathode surface, and the 8YSZ coating was deposited on a large area of samples. The thickness of the coating is up to 120 渭 m, and the coating has porous structure. The coating is composed of cubic phase, tetragonal phase 8YSZ and Pt. The results of air cycling oxidation show that with the increase of Pt content in the coating, The toughening effect of Pt particles on 8YSZ coating is that the plastic deformation absorbs the energy of crack propagation, passivates the crack tip and reduces the crack size. The critical fracture stress of the coating is increased.
【作者单位】： 北京科技大学新材料技术研究院;
【基金】：国家自然科学基金(11291068)
【分类号】：TG174.4
[Abstract]:A layer of Ni Co Cr Al Y bonding layer was prepared on the surface of superalloy by atmospheric plasma sprayed (APS), and then a layer of 8YSZ coating with dispersed Pt particles was prepared by cathodic plasma electrodeposition of (CPED). By adding ceramic beads into the electrolyte, uniform plasma arc discharge occurred on the cathode surface, and the 8YSZ coating was deposited on a large area of samples. The thickness of the coating is up to 120 渭 m, and the coating has porous structure. The coating is composed of cubic phase, tetragonal phase 8YSZ and Pt. The results of air cycling oxidation show that with the increase of Pt content in the coating, The toughening effect of Pt particles on 8YSZ coating is that the plastic deformation absorbs the energy of crack propagation, passivates the crack tip and reduces the crack size. The critical fracture stress of the coating is increased.
【作者单位】： 北京科技大学新材料技术研究院;
【基金】：国家自然科学基金(11291068)
【分类号】：TG174.4
【参考文献】
相关期刊论文 前4条
1 ;Hot Corrosion Behavior of Double-ceramic-layer LaTi_2 Al_(9)O_(19)/YSZ Thermal Barrier Coatings[J];Chinese Journal of Aeronautics;2012年01期
2 杨晓战,何业东,王德仁,高唯;阴极微弧电沉积钇稳定氧化锆涂层[J];科学通报;2002年07期
3 郑蕾;郭洪波;郭磊;彭徽;宫声凯;徐惠彬;;新一代超高温热障涂层研究[J];航空材料学报;2012年06期
4 刘纯波;林锋;蒋显亮;;热障涂层的研究现状与发展趋势[J];中国有色金属学报;2007年01期
【共引文献】
相关期刊论文 前10条
1 涂漫燕;刘一华;;涂层对V形切口断裂影响的有限元分析[J];安徽建筑工业学院学报(自然科学版);2009年02期
2 吴静;朱丽娟;袁福河;段绪海;;K417G高温合金纳米氧化锆热障涂层的制备与性能[J];中国表面工程;2006年05期
3 张伟;郭永明;陈永雄;;热喷涂技术在产品再制造领域的应用及发展趋势[J];中国表面工程;2011年06期
4 韩伟,何业东;微等离子体增强电化学及其在表面技术中的应用[J];表面技术;2005年05期
5 徐娜;李晨希;李荣德;尹红霞;;功能梯度材料的制备、应用及发展趋势[J];材料保护;2008年05期
6 李美Y，
本文编号：2252731
本文链接：https://www.wllwen.com/kejilunwen/jinshugongy/2252731.html
教材专著
