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Y2O3含量和燒結(jié)溫度對ODS鎳基合金性能的影響
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國家自然科學(xué)基金重點項目（50634060）


Effect of Y2O3 Content and Sintering Temperature on Mechanical Properties of ODS Nickel-Based Superalloy
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    摘要:

    采用粉末冶金技術(shù)，以不同質(zhì)量分?jǐn)?shù)（0%~10%）Y2O3為彌散相，用不同的燒結(jié)工藝制備出ODS(oxide dispersion strengthened)鎳基高溫合金，借助XRD，OM，SEM，EDAX研究了氧化物含量和燒結(jié)溫度對ODS鎳基高溫合金性能的影響。結(jié)果表明：含1.5% Y2O3經(jīng)1260 ℃保溫2 h真空燒結(jié)的試樣具有較佳的綜合性能，相對密度為90.9%，抗拉強(qiáng)度為669 MPa。對用不同球磨工藝制備的合金粉末進(jìn)行XRD物相分析，并從試樣斷口顯微組織、微區(qū)成分上分析氧化物含量和燒結(jié)工藝對合金力學(xué)性能產(chǎn)生影響的機(jī)制。

    Abstract:

    ODS nickel-based superalloys with different contents of Y2O3 (mass fraction from 0% to 10%) as dispersion phase were prepared by powder metallurgy (PM) method by different sintering technologies. Effects of oxide content and sintering temperature on the mechanical properties of ODS nickel-based superalloys were studied. Results reveal that the sample with 1.5% Y2O3 sintered at 1260 °C for 2 h has optimal comprehensive properties, whose relative density is 90.9% and tensile strength is 669 MPa. The phases of alloy powder prepared by different milling technologies were determined by XRD. The mechanism for the effect of Y2O3 content and sintering temperature on the mechanical properties of the ODS superalloys was analyzed through fracture microstructure observation and micro-area chemical composition analysis.

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陳文婷,熊惟皓,張修海. Y2O3含量和燒結(jié)溫度對ODS鎳基合金性能的影響[J].稀有金屬材料與工程,2010,39(1):112~116.[Chen Wenting, Xiong Weihao, Zhang Xiuhai. Effect of Y2O3 Content and Sintering Temperature on Mechanical Properties of ODS Nickel-Based Superalloy[J]. Rare Metal Materials and Engineering,2010,39(1):112~116.]
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  • 收稿日期:2009-01-23
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