The effects of alloy elements (Zn, Ni) on the properties of copper-based brake materials were investigated.
通过对比研究了合金元素锌和镍对铜基粉末冶金刹车材料性能的影响规律。
2
The hydrogenation efficiency, selectivity and life-time of copper-based catalysts have been improved after the modification of the catalysts.
铜催化剂改良后，提高了加氢效率、选择性和使用寿命。
3
Hydrogenolysis of methyl formate to methanol was the rate-determining process and was mainly catalyzed by nickel-based or copper-based catalyst system.