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将Ag粉和Al2O3粉按不同配比(体积分数,下同)配制后进行高能球磨,然后烧结.研究不同Ag含量对试样烧结性能与断裂韧性的影响.结果表明,高能球磨可使颗粒细化.由于粒子尺寸细小,具有较高的表面能,使得试样的烧结温度明显降低.并且第二相Ag粒子的添加也可明显降低试样的烧结温度,但同时也不同程度地降低了试样的相对密度.Ag粒子的添加量对试样的断裂韧性有较大影响.当Ag含量从0%增加到5%时,断裂韧性也随之增大,当Ag含量为5%时,试样的断裂韧性达到最大值5.12 MPa·m0.5.当Ag含量从5%增加到10%时,由于相对密度急剧降低,使得试样的断裂韧性也随之明显降低.

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