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EB-PVD熱障涂層的表觀壓痕尺寸效應(yīng)
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TG174.453

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Apparent Indentation Size Effect of EB-PVD Thermal Barrier Coatings
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    摘要:

    采用Knoop壓痕法評(píng)價(jià)沉積于鎳基單晶高溫合金基體上的EB—PVD熱障涂層的顯微硬度。測(cè)試結(jié)果表明，熱障涂層系統(tǒng)的顯微硬度存在壓痕尺寸效應(yīng)，即表觀顯微硬度隨施壓載荷的增加而顯著降低。用彈／塑性模型Knoop壓痕能量平衡對(duì)表觀壓痕尺寸效應(yīng)進(jìn)行分析，并從實(shí)驗(yàn)測(cè)試結(jié)果分析得出與載荷無關(guān)的顯微硬度值。

    Abstract:

    Indentation microhardness testing was used to assess the microhardness of an EB-PVD thermal barrier coatings (TBCs) deposited on a single crystal Ni-base superalloy substrate. Tests performed using a Knoop indenter geometry reveal that there is an indentation size effect (ISE), namely that the apparent microhardness decrease significantly with increasing indentation test load. An energy balance analysis based on elastic/plastic indentation model was applied to analyze the apparent ISE and to extract the load-independent hardness from the experimental measurements.

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李美姮 胡望宇 孫曉峰 管恒榮 胡壯麒. EB-PVD熱障涂層的表觀壓痕尺寸效應(yīng)[J].稀有金屬材料與工程,2006,35(2):186~188.[Li Meiheng, Hu Wangyu, Sun Xiaofeng, Guan Hengrong, Hu Zhuangqi. Apparent Indentation Size Effect of EB-PVD Thermal Barrier Coatings[J]. Rare Metal Materials and Engineering,2006,35(2):186~188.]
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  • 收稿日期:2004-10-25
  • 最后修改日期:2006-01-08
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