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OALib Journal期刊
ISSN: 2333-9721
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纳米al/al2o3复合材料的热稳定性机理
Keywords: 复合材料,al/al2o3,热稳定性
Abstract:
？通过对纳米al/al2o3复合材料微观结构的研究,揭示了这种材料热稳定性的特点.在550℃以下,完整的al2o3的外壳限制了al的传输,从而保持了原来的晶粒形态和尺寸.在570℃~650℃的温度范围内,弥散分布的al2o3碎片通过钉扎晶界抑制了al晶粒的长大.即使在660℃,al晶粒熔化后,弥散的al2o3碎片仍可在冷凝过程中有效地抑制al晶粒的长大.
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