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CeO2顆粒對(duì)鈮合金表面鍍滲復(fù)合涂層抗氧化性能的影響
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廣西大學(xué)材料科學(xué)與工程學(xué)院,廣西大學(xué)材料科學(xué)與工程學(xué)院,廣西大學(xué)材料科學(xué)與工程學(xué)院,廣西大學(xué)材料科學(xué)與工程學(xué)院,廣西大學(xué)材料科學(xué)與工程學(xué)院,廣西大學(xué)材料科學(xué)與工程學(xué)院

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TG174.4

基金項(xiàng)目:

國(guó)家自然科學(xué)基金 (51371059,51001032),廣西自然科學(xué)基金(2014GXNSFCA118013),廣西高等學(xué)校高水平創(chuàng)新團(tuán)隊(duì)項(xiàng)目第二批,廣西自然科學(xué)基金創(chuàng)新研究團(tuán)隊(duì)項(xiàng)目(2011GXNSFF018001)


Effect of CeO2 addition on high temperature oxidation resistance of composite coating on Niobium alloy
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College of Materials Science and Engineering,Guangxi University,College of Materials Science and Engineering,Guangxi University,College of Materials Science and Engineering,Guangxi University,College of Materials Science and Engineering,Guangxi University,College of Materials Science and Engineering,Guangxi University,College of Materials Science and Engineering,Guangxi University

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    摘要:

    為了提高鈮合金的高溫抗氧化性，采用化學(xué)鍍結(jié)合包埋滲技術(shù)在鈮合金表面制備了含有CeO2顆粒的復(fù)合涂層，研究了復(fù)合涂層的微觀結(jié)構(gòu)和高溫抗氧化性能。結(jié)果表明，不含CeO2的Al/Ni涂層以NiAl相為主，Al/Ni-CeO2涂層則含NiAl、NiAl3、Al3Nb和CeO2等相。經(jīng)1000℃氧化測(cè)試，Al/Ni復(fù)合涂層氧化50h后增重為8.0 mg/cm2，表面主要生成Al2O3、AlNbO4相；Al/Ni-CeO2復(fù)合涂層50h后氧化增重為4.0 mg/cm2，表面以Al2O3、CeO2、NiAl、NiAl3、Al3Nb、AlNbO4相為主。高溫氧化后，兩種涂層樣品表面均生成連續(xù)致密的Al2O3膜，涂層與基體結(jié)合良好；含CeO2的涂層，其稀土氧化物主要在Ni膜拖拽力作用下富集于涂層互擴(kuò)散區(qū)。稀土氧化物顆粒的添加細(xì)化涂層組織，降低涂層中Al元素的消耗，填補(bǔ)涂層中的孔洞，增強(qiáng)了氧化膜與涂層的粘附力，有效提高了涂層的抗氧化性。

    Abstract:

    In order to improve high temperature oxidation resistance of niobium alloy, electroless plating combined with pack cementation technologies was used to obtain composite coatings with or without CeO2 particles. The microstructure and high temperature oxidation resistance of the composite coatings were investigated. Al/Ni coating contains NiAl phase, while Al/Ni-CeO2 coating is made up of NiAl, NiAl3, Al3Nb and CeO2, etc. The oxidation test of the composite coatings was carried out at 1000℃. The results show after 50 h oxidation mass gain of the Al/Ni composite coating was 8.0 mg/cm2, with the formation of Al2O3 and AlNbO4 phase; The mass gain of the Al/Ni-CeO2 composite coating after 50 h oxidation was 4.0 mg/cm2, with Al2O3, CeO2, NiAl, NiAl3, Al3Nb and AlNbO4 phase. On the surface of two coating systems continuous dense Al2O3 scales were detected with good adhesion to the coating. CeO2 particles were mainly aggregated in the interdiffusion zone under the drag force of Ni. The addition of CeO2 particles refines the coating structure, reduces the consumption of Al element in the coating, fills the holes, and enhances the adhesion of the scales to the coating, so as to improve the oxidation resistance of the coating.

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楊陽(yáng),黃祖江,唐仕光,董婉冰,李偉洲,張修海. CeO2顆粒對(duì)鈮合金表面鍍滲復(fù)合涂層抗氧化性能的影響[J].稀有金屬材料與工程,2017,46(12):3953~3960.[YANG Yang, Huang Zujiang, Tang Shiguang, Dong Wanbing, LI Weizhou, Zhang Xiuhai. Effect of CeO2 addition on high temperature oxidation resistance of composite coating on Niobium alloy[J]. Rare Metal Materials and Engineering,2017,46(12):3953~3960.]
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  • 收稿日期:2015-10-09
  • 最后修改日期:2016-03-10
  • 錄用日期:2016-03-30
  • 在線發(fā)布日期: 2018-01-04
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