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分散劑Y2O3對滲鋁層的影響
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TG156.86

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吉林省自然科學(xué)基金項(xiàng)目（20020628-1）資助


Effect of Pack Aluminizing Filler Y2O3 on Aluminide Coatings
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    摘要:

    通過改變傳統(tǒng)滲劑來研究分散劑（Al2O3，Y2O3）在滲鋁過程中的作用和對滲鋁層的影響。利用XRD和SEM對滲層相的組成、氧化前后表面形貌進(jìn)行分析。結(jié)果表明：分散劑Y2O3在最初的滲鋁過程中參加了滲鋁過程，不僅防止鋁粉粘結(jié)，而且影響滲層相的組成。分散劑為Al2O3時(shí)，滲層主要為Al3Ti＋AlTi＋AlTi3相，而分散劑中含有Y2O3時(shí)，滲層土要為AlTi3相，這與傳統(tǒng)滲鋁機(jī)理認(rèn)為分散劑在滲鋁過程中不參加滲鋁反應(yīng)相矛盾。同時(shí)，分散劑也影響著滲鋁層氧化前后的表面形貌及Al2O3的晶格類型。

    Abstract:

    The effect of pack aluminizing fillers (Al2O3, Y2O3) on the aluminide coatings are studied by changing the traditional pack aluminizing. The phases and the surface morphologies of aluminide coatings before and after oxidation are examined by XRD and SEM. The results show that the pack aluminizing fillers take part in the aluminizing process, which does not only keep the Al power from sintering, but also affect the phases in the aluminide coatings. The aluminide coatings with the pack aluminizing fillers (Al2O3) are mainly composed of Al3Ti + AlTi + AlTi3 phase, but mainly of AlTi3 phase when the pack aluminizing fillers contain Y2O3, which conflicts with the traditional mechanism of pack aluminizing. The pack aluminizing fillers also have much effect on the surface morphologies of aluminide coatings before and after oxidation and the style of Al2O3 crystal lattice.

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趙宇光 周偉 趙玉謙 梁云虹 秦慶東.分散劑Y2O3對滲鋁層的影響[J].稀有金屬材料與工程,2005,34(10):1574~1577.[Zhao Yuguang, Zhou Wei, Zhao Yuqian, Liang Yunhong, Qin Qingdong. Effect of Pack Aluminizing Filler Y2O3 on Aluminide Coatings[J]. Rare Metal Materials and Engineering,2005,34(10):1574~1577.]
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  • 收稿日期:2004-06-22
  • 最后修改日期:2005-07-12
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