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OALib Journal期刊
ISSN: 2333-9721
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al--si合金的储热性能
Keywords: 金属材料,铝硅合金,相变材料(pcms),潜热
Abstract:
？对si含量为10\%$\sim$13\%的al--si合金进行了加速氧化、热循环和掺fe实验,研究了其在不同热循环条件下的相变储热性能和可靠性.结果表明,在空气中经几百h的高温氧化后,氧化率小于0.01\%,其影响可以忽略不计.经过0,4,23,60,100,200,300,400,500,600,700次熔化－凝固循环后,相变温度的变化为3.8$\sim$11.8℃,相变潜热从484.86kj/kg下降到432.62kj/kg.当al--si合金的掺铁量为0.5\%时,相变潜热下降6.5\%;对于缓冷的储能过程,偏析较小并在循环多次后趋于缓和和稳定.al--si合金成份和结构的变化对材料的储热性能影响较小,在长期的热循环过程中有良好和稳定的储热性能.\
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