The distribution and transformation of added and native Ni in purple soils were investigated with both sequential extrac......

研究了添加合金元素Ni对6-6-3锡青铜-石墨材料物理机械及摩擦磨损性能的影响。结果表明:添加Ni可以改善6-6-3锡青铜石墨材料的性能......