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OALib Journal期刊
ISSN: 2333-9721
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ni3al金属间化合物多孔材料的制备及抗腐蚀性能
Keywords: 金属材料,ni3al金属间化合物,多孔材料,kirkendall效应,抗碱腐蚀性能
Abstract:
？使用粉末冶金模压成形和无压反应烧结方法制备出ni3al金属间化合物多孔材料,研究了反应过程中ni3al金属间化合物多孔材料的体积膨胀、孔结构参数、组织形貌,以及在koh溶液中的抗腐蚀性能。结果表明:烧结后ni3al金属间化合物多孔材料发生了显著膨胀,最大孔径和开孔隙度都随着温度的升高而升高,当温度到达750℃时体积膨胀受到限制,最大孔径出现下降趋势;kirkendall效应导致的镍铝偏扩散反应是体积膨胀和孔隙形成的主要原因。在碱溶液中ni3al金属间化合物多孔材料的腐蚀电位偏正、质量稳定,表现出优异的抗腐蚀性能。
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