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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