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- Great progresses have been made both in the scope of substrates and the enantioselectivity with the metal-based catalysts containing Pd,Co,Cu ,Re and Zn in the reaction in recent years. 金属钯、钴、铜、铼和锌作为亚胺不对称还原的新型催化剂是最近几年发展起来的,在底物普适性和产物对映选择性方面取得了很大的进展。
- The determination of boron in BMg alloy powder with acid-base titration method was established. 报道了酸碱滴定法测定硼镁合金中的硼。
- This paper discussed the idea of the gas atomization Mg and Mg - Al alloy powder by supersonics high ptire N2 gas. 介绍了用超音速高纯氮气流来生产气雾化镁和镁铝合金粉的设想。
- The magnetic domain structures of Nd Fe B alloys prepared by the two techniques of powder metallurgy and explosive compaction were also studied using the MFM technique. 并用这种技术观察了粉末烧结和爆炸压制两种工艺制备的 Nd- Fe- B合金的磁畴 ;给出了它们各自不同的畴结构特征 .
- Surface thermal spray weld process with alloy powder is a new technology of surface protecting and hardening. 合金粉末表面热喷焊技术是一种新的表面防护和强化工艺。
- Titanium alloy powder was prepared by rapid solidification and mechanical milling. 采用快速凝固/机械球磨法制备钛合金粉末;
- When the superconducting Niobium stannide Nb_3Sn was produced by vapor-deposited process, Hastelloy B alloy was selected usually as the substrate material. 气相沉积法制备Nb_3Sn超导带,通常选用Hastelloy B合金作基带材料。
- Cu Co Fe alloy powder 铜钴铁合金粉
- The active La in alloy powder can reduce the oxide film on Ti particles,increase the reactivity of Ti,and promote the reaction between Ti and diamond. 经X射线衍射分析发现,合金粉中的活性La能够还原Ti颗粒表面的氧化物薄膜,提高了Ti的活性,从而促进了Ti和金刚石的反应。
- The influencing factors and densification mechanism of iron-based high temperature alloy powder by pressing were investigated. 研究铁基高温合金粉末模压成形致密化过程中的影响因素和作用机理。
- Activated carbon powder and alloy powder is added into the thermite at the time of preparing CLSP(ceramic-lined steel composite pipe). 在制备陶瓷内衬复合钢管时,在铝热剂中加入活性碳粉、合金粉末,使原来纯铁过渡层成为钢过渡层,硬度大幅度提高,从而使钢管抗压强度明显提高。
- The influences of laser on plasma arc beam form,width and depth of molten pool in the high temperature alloy powder deposition were investigated. 研究了等离子激光复合熔积高温合金粉末过程中激光对等离子弧柱形态、熔积时熔深和熔宽等的影响。
- The alloy powder was produced by gas atomization.P/M material samples were made by pressing and sequent vacuum sintering. 通过气喷气冷法制取合金粉末,用压制后真空烧结的方法制备高铝锌基合金粉末冶金材料。
- During the dissolution diffusion bonding process, control of the heat is important to improve well cutability, besides using special alloy powder. 在铸件液膜溶解扩散焊修复工艺中,为保证修复部位良好的加工性能,除采用特制的合金粉末材料外,热过程的控制也是重要的因素。
- The results showed that the light beam Ni-based alloy powder surfacing layer can metallurgically bond with the Fe-C alloy substrate. 采用光束镍基合金粉末堆焊可在铁碳合金表面获得与基体冶金结合良好、无裂纹、轻度稀释的强化层。
- Development of ferromagnetism nanometer Co particles used for self-assembled 用于自组装巨磁阻材料的铁磁性纳米Co粒子的研制
- The major influenceable elements on the quality of cast infiltration are pouring temperature and mixture of alloy powder briquette. 利用正交试验方法,研究了浇注温度、铸件模数、膏块的合金配比及厚度等工艺因素对铸渗质量的影响规律。
- The chemical symbol for copper is "Cu". 铜的化学符号是Cu。
- A niobium-cobalt-rare earths alloy powder was investigated,which was used to improving combined properties of valve cone surface of internal combustion engine. 研究应用稀土铌钴合金粉末材料提高内燃机气门锥面材料的综合性能。
- B: Two cu of black coffee, please. 两杯清咖啡,谢谢。