最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級(jí)檢索
γ-TiAl表面NiCrAlY/Al復(fù)合涂層的高溫氧化行為
DOI:
作者:
作者單位:

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

國(guó)家自然科學(xué)基金面上項(xiàng)目 (51174119)；江蘇省普通高校研究生科研創(chuàng)新計(jì)劃 (CXZZ12-0149)；中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金；航空科學(xué)基金 (2012ZF52071)


Oxidation Behavior of γ-TiAl Alloy with NiCrAlY/Al Duplex Coating at 950 oC
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評(píng)論
    摘要:

    采用磁控濺射和電弧離子鍍技術(shù)在γ-TiAl合金表面制備NiCrAlY/Al復(fù)合涂層，研究了復(fù)合涂層對(duì)提高γ-TiAl合金抗高溫氧化性能的作用機(jī)理。經(jīng)950 ℃恒溫氧化100 h后，涂層表面未發(fā)現(xiàn)裂紋和脫落，涂層試樣氧化增重值較基體大幅減小。對(duì)氧化層進(jìn)行了SEM、EDS和XRD分析，結(jié)果表明無保護(hù)涂層的基體γ-TiAl合金表層疏松多孔，無法抵抗高溫環(huán)境下氧氣對(duì)基體合金的侵蝕。復(fù)合涂層表面的NiCrAlY鍍層在氧化過程中形成了Cr2O3，α-Al2O3和β-NiAl相組成的致密防護(hù)涂層，阻隔了氧氣與基體的接觸，中間的Al層為表層持續(xù)生成Al2O3提供了Al源。NiCrAlY/Al復(fù)合涂層顯著提高了基體在950 ℃下的抗高溫氧化性能。

    Abstract:

    A NiCrAlY/Al duplex coating was prepared by arc ion plating and magnetron sputtering. The effects of the duplex coating on oxidation at elevated temperature were investigated. After exposure in air at 950 oC for 100 h, the mass gain of the NiCrAlY/Al coated specimen is much smaller than that of the uncoated substrate, and no peeling is found in the NiCrAlY/Al coating. SEM, EDS and XRD have been used to study the microstructure, elements distribution vs. depth and phase formation of the two oxidized layers. Due to the loose structure, the scale on the bare substrate could not contribute a reliable protection against intrusive oxygen at high temperature. As an oxygen barrier, the NiCrAlY/Al coating is capable of forming a protective scale which is consisted of Cr2O3, α-Al2O3 and β-NiAl. The Al interlayer plays a role of aluminizing resource for the formation of protective Al2O3 layer. All the results indicate that the oxidation resistance of γ-TiAl alloy has been improved effectively by NiCrAlY/Al duplex coating.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

徐 一,繆 強(qiáng),梁文萍,王 玲,于修水,蔣 穹,任蓓蕾.γ-TiAl表面NiCrAlY/Al復(fù)合涂層的高溫氧化行為[J].稀有金屬材料與工程,2014,43(6):1407~1411.[Xu Yi, Miao Qiang, Liang Wenping, Wang Ling, Yu Xiushui, Jiang Qiong, Ren Beilei. Oxidation Behavior of γ-TiAl Alloy with NiCrAlY/Al Duplex Coating at 950 oC[J]. Rare Metal Materials and Engineering,2014,43(6):1407~1411.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2013-06-22
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期: 2014-11-13
  • 出版日期: