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发现亚微米级Al2O3p／6061复合材料的微屈服抗力较高、组织稳定性好，其微屈服抗力与微望变符合Brown和Lukens提出的线性规律：通过与SiCp／6061和AlNp／6061的微屈服行为与组织的对比分析，认为增强体颗粒形状、尺寸以及基体中位错密度、亚晶粒尺寸等因素直接影响微屈服抗力.亚微米级颗粒增强复合材料对尺寸稳定性要求来说，微观组织形态较合理，是较理想的精密仪表材料．
It is found that the micro-yield strength of submicron Al2O3p / 6061 composites is high, the microstructure stability is good, and the micro-yield resistance and micro-creep meet the linear rule proposed by Brown and Lukens. Through the comparison with the micro yielding of SiCp / 6061 and AlNp / 6061 Behavior and organization, it is considered that the shape and size of the reinforcement body, the dislocation density in the matrix, the subgrain size and other factors directly affect the micro-yield resistance.For the requirements of dimensional stability of submicron particle reinforced composites, the microstructure Form a more reasonable, is an ideal precision instrument materials.