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12 January 2015; accepted 2 April 2015 Abstract: Low melting point metals (Ga, In, Sn) as alloy elements were used to prepare Al-In-Sn and Al-Ga-In-Sn alloys through mechanical ball milling method...; hydrogen generation; mechanical ball milling method 1 Introduction As a kind of green and renewable energy, hydrogen has been considered as one of the ideal alternatives for fossil fuels [1]. However......
in hydrogen, the alloy was crushed into coarse powders by using a mechanical hammer. The hydrogenation of the alloy powders was performed by room-temperature reaction ball milling in hydrogen. The ball-mill used was a planetary type QM-DY4. During milling, the hydrogen pressure in the vial was kept above 0.5 MPa. The ball-to-powder mass ratio was 60?1, and the mill shaft rotation speed was 400 r/min......
Press and Springer-Verlag Berlin Heidelberg 2017 Abstract: Nanocrystalline/amorphous LaMg11Ni+xNi (x=100%, 200%, mass fraction) composite hydrogen storage alloys were synthesized by ball milling... behavior of LaMg11Ni and found that the ball milling for 20 h makes hydrogen absorption capacity of LaMg11Ni increase by about 20%, and the kinetics of hydrogen absorption was markedly improved. ZHANG et al......
, preoxidation and ball milling [4,5]. Different types of raw materials (such as different carbon sources) were also tested [6]. TRIPATHY et al [6] investigated the reduction of an ilmenite ore... requirements and improving reduction efficiency as well. WELHAM et al [10,11] and CHEN [12] found that ball milling can accelerate the reduction process of ilmenite by carbon after long time milling......
of Southeast University, Nanjing 210096, China Received 15 July 2007; accepted 10 September 2007 Abstract: The nano-composite powders of CeO2/Zn were prepared with high energy ball milling... is 1%. Key words: high energy ball milling; CeO2; nanocomposite; corrosion resistance; hardness 1 Introduction The nanocomposite is the advanced subject of the research in high performance......
after ball milling for different time 图3 分别球磨2 h,3 h,4 h的短碳纤维/铜复合材料的显微组织和短碳纤维长度频率分布 Fig. 3 Microstructures of SCF/Cu composites by ball milling for different time((a)-(c)) and frequency...覆的碳纤维和铜球磨分散4 h后混合粉形貌 Fig. 6 Morphologies of degummed SCF without PR coating + Cu mixed powder after ball milling for 4 h 图7 球磨过程中酚醛树脂对碳纤维的分散和保护作用的SEM观察 Fig. 7 SEM observation......
and high energy ball milling, then the powders prepared were sealed in evacuated quartz tubes for homogenization annealing at 1 123 K for 2 h. The phase structure and the microstructure of the alloys... the region near the least reflectivity peak. Key words: Y-Fe-Cr alloy; microwave absorber; arc melting method; high energy ball milling 随着现代雷达和微波电子技术的迅猛发展,使吸波材料在国防和民用领域得到广泛应用.特别是由于移动通讯和电子设备在日常生活中使用越来越广泛,因此......
; Abstract: Nano-crystalline pre-alloyed powders of W-Ni-Fe were fabricated by high energy ball milling mechanical alloying (MA) technique. The change of appearances and the crystallite sizes of powders before and after high energy ball milling were investigated by XRD, TOPAS P software, SEM and EDS. The results show......
and Mg1.95RE0.05Ni(RE= La,Ce,Pr,Nd,Y)ternary alloys were prepared by ball milling of mixted powder of Mg,Ni,RE and sintering under the protection of argon.XRD analysis shows that Mg2-xNdxNi(x=0.05,0.1.... Key words:metal materials; Mg2Ni; Mg2-xRExNi; ball milling; crystal structure; rare earths; [全文内容正在添加中] ......
