Spray deposited porous aluminum alloy sheets easily have surface and edge crack when they are directly rolled due to the porosity and metallurgical bond 摘要喷射沉积多孔铝合金板坯由于有孔洞且缺乏良好的冶金结合，直接轧制时易出现板坯表面裂纹及边裂。
2.
The multilayer structure clad diamond have such advantages as : comperssion strength and oxidation resistance of diamand at high temperature and metallurgical bond strength between the clad diamond and the matrix material are increased 多层结构的包衣金刚石具有许多优点：提高了单颗粒金刚石抗压强度、高温条件下的抗氧化能力以及提高包衣金刚石与胎体材料之间的冶金结合能力等等。
