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

+高級檢索
TiAl合金表面等離子噴涂MCrAlY涂層熱腐蝕行為研究
DOI:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項(xiàng)目:

國家自然科學(xué)基金(59975046, 50305010)；江蘇省自然科學(xué)基金重點(diǎn)項(xiàng)目(BK2004005)


Study on Hot Corrosion Behavior of Plasma-Sprayed NiCoCrAl-Y2O3 Coating on TiAl Alloy Surface
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
    • |
  • 文章評論
    摘要:

    研究TiAl合金表面等離子噴涂NiCoCrAl-Y2O3涂層在850 ℃下對75%Na2SO4+25%NaCl熔鹽的熱腐蝕行為，及對TiAl金屬間化合物抗高溫?zé)岣g性能的影響。研究表明，在850 ℃，等離子噴涂NiCoCrAl-Y2O3涂層由于生成Cr2O3，NiO和NiCr2O4等各種氧化物組成的氧化層，顯著提高了TiAl基體的抗熱腐蝕性能。在熱腐蝕過程中，S元素以Ni元素為載體，逐步滲入涂層中，生成過渡產(chǎn)物Ni3S2。隨著O分壓的升高，反應(yīng)進(jìn)入了氧化階段，生成Cr2O3、NiO等氧化物，隨著兩種物質(zhì)含量的增加，最后發(fā)生固相反應(yīng)，生成尖晶石結(jié)構(gòu)的NiCr2O4化合物。過渡產(chǎn)物Ni3S2與腐蝕介質(zhì)中的Cl-離子形成微電池，可以加快熱腐蝕反應(yīng)速度

    Abstract:

    The hot corrosion behavior of plasma-sprayed NiCoCrAl-Y2O3 coating on TiAl alloy surface in the mixed melted salt of 75%Na2SO4+25%NaCl at 850 oC for 100 h and the influence of the coating on the anti-corrosion properties of TiAl intermetallics were investigated. The results show that the plasma-sprayed NiCoCrAl-Y2O3 coating could remarkably improve the hot corrosion resistance of TiAl matrix by generating a compound oxide layer of Cr2O3, NiO and NiCr2O4. In the course of hot corrosion, S, carried by Ni, gradually infiltrated into the composite coating and generated a transition product of Ni3S2. Then the partial pressure of the oxygen increased, followed by oxidation which produced oxides including Cr2O3 and NiO. As the amount of the both oxides increasing, the solid-state reaction took place and generated the NiCr2O4 compounds of spinel structure. The transition product of Ni3S2 and the chloridion contained in corrosion media jointly constituted micro-cell, thus accelerating hot corrosion

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

田宗軍,高雪松,黃因慧,劉志東,沈理達(dá),王東生. TiAl合金表面等離子噴涂MCrAlY涂層熱腐蝕行為研究[J].稀有金屬材料與工程,2010,39(8):1439~1442.[Tian Zongjun, Gao Xuesong, Huang Yinhui, Liu Zhidong, Shen Lida, Wang Dongsheng. Study on Hot Corrosion Behavior of Plasma-Sprayed NiCoCrAl-Y2O3 Coating on TiAl Alloy Surface[J]. Rare Metal Materials and Engineering,2010,39(8):1439~1442.]
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:2009-09-28
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: