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; 文献标志码:A 文章编号:1672-7207(2013)10-4069-05 Study on axial vibration of feed drives and rolling vibration of ball screw ZHOU Yong, XU Xuesan, WANG Guoxian, CAO Xiaohua (School of Logistics Engineering, Wuhan University of Technology, Wuhan 430063, China) Abstract: A dynamic model of the ball screw feed drives......
was prepared by heating a precursor, which was obtained through ball milling with slurry of H2C2O4·2H2O, NH4H2PO4, NH4VO3 and LiF. In this process, H2C2O4·2H2O was used as a reducing agent as well... curve. Key words: lithium ion battery; LiVPO4F; ball milling; cathode material; carbon coating 1 Introduction Framework materials based on the phosphate polyanion, such as LiFePO4, LiMnPO4 and Li3V2......
后,2024铝合金表面形成界面结合良好且平均厚度为20 μm的TiC/Al复合涂层.涂层最大显微硬度值高达314HV0.1,是基体硬度值的2倍多.界面处的显微硬度呈现梯度变化,对合金层起到很好的缓冲和支撑作用.摩擦磨损测试表明,涂层有效地降低原有材料的摩擦因数,使其耐磨性得到一定程度的提高. 关键词:高能球磨; TiC/Al复合涂层; 界面; 显微硬度; high energy ball milling; TiC/Al composite coating; interface; micro-hardness; [全文内容正在添加中] ......
低温烧结制备超细晶FeAl合金及性能的研究 刘安强1,李莉1,郭丽娜1,詹肇麟1 (1.昆明理工大学,真空冶金国家工程实验室,昆明,650093;2.昆明理工大学,材料科学与工程学院,昆明,650093) 摘要:Fe,Al混合粉末经高能球磨后,在560~620℃进行低温烧结.结果表明,低温烧结温度对合金组织有明显的影响,经过12h球磨,在620℃烧结4h,可以得到超细晶FeAl金属间化合物.SEM,AFM和XRD的分析结果表明,晶粒均匀,呈等轴状,大小约为30nm左右.超细晶FeAl金属间化合物的显微硬度较低,断裂为韧窝断口,呈现塑性变形特征. 关键词:FeAl合金; 金属间化合物; 高能球磨; 低温烧结; 晶粒细化; FeAl alloy; intermetallics; high-energy ball milling; low-temperature sintering......
; induction melting; ball milling; hydrogen absorption/desorption properties; [全文内容正在添加中] ......
General issues of FEM in backward ball spinning of thin-walled tubular part with longitudinal inner ribs JIANG Shu-yong(江树勇), REN Zheng-yi(任正义), WU Bin(吴 滨), WU Gui-xiang(武桂香) Engineering...; Abstract: Backward ball spinning was applied for manufacturing thin-walled tubular parts with longitudinal inner......
alloys with different Nd contents were prepared in graphite crucible under the protection of covering agent. High energy ball-milling was performed to obtain Mg-based nanocomposite hydrogen storage...; hydrogen storage materials; high-energy ball milling; absorption and desorption kinetics Foundation item: Project(BK20191020) supported by the Natural Science Foundation of Jiangsu Province, China......
: one was blended elemental(BE) powder mixture; the other was mechanically milled(MM) powder mixture milled for5 h using planetary ball milling. Both powder mixtures were pressed under a uniaxial pressure...Effects of Mechanical Milling and Sintering Temperature on the Densification, Microstructure and Tensile Properties of the Fe–Mn–Si Powder CompactsZhigang Xu,Michael A.Hodgson,Peng CaoDepartment......
milling. The equilibrium phases of Al-Zn-Cu alloys were analyzed by XRD. The results show that the equilibrium phases of these three alloys can be obtained by ball milling at room temperature... of the alloys. During ball milling, the stress provides adequate deformation in the inner structure, which supplies enough driving force and diffuse alleyway of atom for the transformation of metastable......
properties and insufficient corrosion resistance and electrical conductivity. Generally, ball milling and sintering techniques have been used to produce NiFe2O4-based cermet. However, well-blended, fine... grinding efficiency and noisy-power dissipation in the grinding of NiO/Fe2O3. Three major mechanical energy dissipation modes were found during planetary ball milling operation: efficient energy......
