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高能球
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  high energy ball
     Structure and Magnetic Properties of High Energy Ball Milling La_(2/3) Ca_(1/3) MnO_3
     高能球磨对La_(2/3)Ca_(1/3)MnO_3晶体结构和磁性的影响
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     Study on Phase Transformation of Al_2O_3 during High Energy Ball Milling in Nitrogen Atmosphere
     氮气气氛高能球磨Al_2O_3相变研究
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     Influence of La_2O_3, CeO_2 on Preparing the Nanometer Cobalt-based Catalysis Material by the High Energy Ball Mill
     轻稀土氧化物(La_2O_3,CeO_2)对高能球磨制备纳米Co基催化材料的影响研究
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     Preparation of CeO_2/Al Nanocomposite Powder by High Energy Ball Milling
     高能球磨制备纳米CeO_2/Al复合粉末
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     High Energy Ball Milling Process of Al and K_2TiF_6 Powders
     铝与K_2TiF_6混合粉末的高能球磨反应
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  “高能球”译为未确定词的双语例句
     The Microstructure and Magnetic Properties of a High-energy Ball Milled Nd_(14)Dy_1Fe_(72)Co_5B_8 Alloy
     高能球磨Nd_(14)Dy_1Fe_(72)Co_5B_8合金的微观结构和磁性
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     Effect of high-energy ball-milling process on the Sm_2Fe_(16)Ti_1N_x compounds prepared by HDDR
     HDDR处理的Sm_2Fe_(16)Ti_1N_x化合物高能球磨的研究
     Investigation on Al_2O_3-Y_2O_3 mixtures prepared by high-energy ball milling
     高能球磨Al_2O_3-Y_2O_3粉体混合物的研究
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     Microstructure and Fracture Behavior of 15%SiC/2009Al Composite by Ball Milling
     高能球磨制备15%SiC/2009Al复合材料的微观组织与断裂行为
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     High Energy Milling Process of the ZrO_2-30mol% CeO_2 Mixed Powder
     ZrO_2-30mol%CeO_2陶瓷粉末的高能球磨过程
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  相似匹配句对
     The mechanism of MA in high energy ball-milling technology
     高能磨中的机械合金化机理
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     Fabrication of nanocrystalline TiC powder by high-energy ball milling
     高能磨制备纳米TiC粉末
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     Hard Alloy Sphere
     硬质合金
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     The Invention of Ball
     的发明
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  high energy ball
Microwave permeability change of FeCo nanocrystalline during high energy ball milling
      
The microstructure and chemical bonds of β-C2S under the high energy ball grinding function
      
Preparation of MgTiO3 ceramics by high energy ball milling
      
Carbon microspheres produced by high energy ball milling of graphite powder
      
During high energy ball milling of graphite powder, carbon microspheres were produced from necklace-like carbon structures that were gradually peeled off and finally fractured into particles.
      
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Studies were made of the mechanical alloying of an oxide dispersion strengthened majority γ'-phase Ni-base superalloy by analyses of SEM and X-rays. By a high energy ball milling technique, a mechanical solid-solution may be formed and the mechanical alloying may be realized from various raw metal powders, The CrNi-based masteralloy and elements such as W, Mo, Ta, etc. in the raw metal powders were continually solid-soluble into Ni matrix and the lattice parameter of Ni-base solid-solution was increased with...

Studies were made of the mechanical alloying of an oxide dispersion strengthened majority γ'-phase Ni-base superalloy by analyses of SEM and X-rays. By a high energy ball milling technique, a mechanical solid-solution may be formed and the mechanical alloying may be realized from various raw metal powders, The CrNi-based masteralloy and elements such as W, Mo, Ta, etc. in the raw metal powders were continually solid-soluble into Ni matrix and the lattice parameter of Ni-base solid-solution was increased with processing time. Simultaneously, nearly random dispersion of the ultraflne oxide particles was obtained in the metal matrix. Although the micro-area compositions of the mechanical solid-solution is segregated, yet it may be improved by certain effective steps. The technical parameters of the mechanical alloying in aUoy studied were also analyzed and discussed.

本文用扫描电镜和X射线对一种复杂的弥散强化Ni基高温合金的机械合金化进行了研究。实验表明,采用高能球磨的方法可以使原料中的各种金属粉末间形成机械固溶体,实现合金化。在球磨过程中,原料中的Cr-Ni基母合金以及W,Mo,Ta等元素不断向Ni基体中周溶,使Ni基固溶体γ_(Ni)的点阵参数逐渐增大。同时,超细氧化物粒子在基体中也逐步达到理想的分布状态。这种机械固溶体虽存在一定的微区成分偏离,但可以通过某些有效措施使之显著减小。本文对机械合金化工艺参数也进行了分析和讨论。

Dispersion-strengthening Al-C alloys have been prepared by mechanical alloying technology. Its technological process was as follows: high energy milling of pure aluminium powder with carbon black or organic agents, cold isostatic compacting of the milled powder at 2—2.5 t/cm~2, packing the green compacts with pure aluminium sheet without scaling, heating the compacts to 550-600℃ in nitrogen atmosphere for 1 hr., and final hot extrusion consolidation to obtain extruded bars of diameter 13mm with reduction ratio...

Dispersion-strengthening Al-C alloys have been prepared by mechanical alloying technology. Its technological process was as follows: high energy milling of pure aluminium powder with carbon black or organic agents, cold isostatic compacting of the milled powder at 2—2.5 t/cm~2, packing the green compacts with pure aluminium sheet without scaling, heating the compacts to 550-600℃ in nitrogen atmosphere for 1 hr., and final hot extrusion consolidation to obtain extruded bars of diameter 13mm with reduction ratio of 26:1. In the present work, two methods of addition of carbon were used and compared: physical carbon method, in which carbon black was adoped directly; chemical carbon method, in which carbon was created through the decomposition of organic agents, such as stearic acid or methanol during milling or subsequent heat treatment. The experiment results showed that both the methods of carbon addition could achieve excellent mechanical properties at normal or elevated temperature, and the strength levels could reach or surpass those of coventionally produced SAP aluminium alloys. The tensile properties of the extruded bar with chemical 1.23 w.t% carbon at room temperature were σ_b 42—43 kg/mm~2(412—422 MN/m~2), δ 5—8%, ψ 18—21%, and that with physical 3wt.%carbon, σ_b 37—39 kg/mm~2 (363—382MN/m~2), σ 8—10%, ψ13—17%. It is evident that the effect of chemical carbon on mechanical properties is considerably better than that of physical carbon, which might be contributed to a more fine and more uniform distribution of dispersoids. But the addition of physical carbon is beneficial to the safety in operating of the milled powder, and the elemental composition can be accurately controlled. The technology of powder forging was also described briefly. In order to reduce the cold work hardening of milled powder and create in-situ Al_2O_3 and Al_4C_3 dispersoids, the milled powder was annealed in nitrogen atmo- sphere at 550—600℃ for 1 hr., and then the softened powder was die pressed into preforms of 9.2mm (width)×67.9mm(length) at 3—3.5t/cm~2, and finally the preforms were heated in dissociated ammonia at 600℃ and forged in a 60t frictional press to obtain billets of 12.6mm×70.2mm. The forging products, especially alloy with the addition of chemical carbon, possess good mechanical properties except low ductility, for example, the alloy containing chemical 0.99 wt.% carbon was σ_b 35—37kg/mm~2 (343—363MN/m~2), the elevated temparature tensile strength at 300 and 400℃ was 26—27kg/mm~2(255—265MN/m~2) and 19—20 kg/mm~2(186—196MN/m~2) respectively.

高能球磨纯铝粉和碳,然后把处理好的粉末热挤压密实,制得了弥散强化Al-C合金。本研究工作采用并比较了两种添加碳的方法——物理碳法和化学碳法。结果表明,两种方法都能得到很好的室温和高温性能,而且强度水平达到和超过SAP铝合金。化学碳法对性能的影响明显地优于物理碳法,但是添加物理碳对合金粉末的安全操作是有利的,同时组份可以得到精确的控制。本文简要地叙述了粉末锻造工艺,除塑性差外锻造制品的其他机械性能也是良好的,特别是对添加化学碳的合金。

The microstructure and the relationship between the coercivity and the structure of the ball milled Nd_(14)Dy_1Fe_(72)Co_5B_8 alloy were investigated.It is suggested that the coercivity of the milled alloy results from domains wall pinning at boundaries.At the initial state of milling,the coercivity increases with milling time,which may mainly be attributed by the increa- se of boundary density caused by decreasing grain size.At the sage of more than 30 hrsof milling,the coercivity decreases with milling time;this...

The microstructure and the relationship between the coercivity and the structure of the ball milled Nd_(14)Dy_1Fe_(72)Co_5B_8 alloy were investigated.It is suggested that the coercivity of the milled alloy results from domains wall pinning at boundaries.At the initial state of milling,the coercivity increases with milling time,which may mainly be attributed by the increa- se of boundary density caused by decreasing grain size.At the sage of more than 30 hrsof milling,the coercivity decreases with milling time;this eff- ect may be due to an introduction of mierostrains and defeets into the crys- tal lattice in the process of mechanical grinding,which would eventually reduce the anisotropy field of the 2-14-1 phase.

本文采用 X 射线衍射,透射电镜和振动样品磁强计等技术研究了 Nd_(14)Dy_1Fe_(72)Co_5B_8合金在高能球磨过程中的结构变化以及结构与矫顽力的关系。我们认为高能球磨 Nd_(14)Dy_1Fe_(72)Co_5B_8合金的矫顽力源于晶界对畴壁的钉扎。在球磨初期,矫顽力随球磨时间的增加而增加,这主要归结于晶粒细化引起的晶界密度的增加。当球磨时间超过30小时,矫顽力随球磨时间的增加而减小,这可能是由于在球磨过程中引入很大的微观应力和高密度的缺陷,导致 R_2TM_(14)B(R=Nd、Dy;TM=Fe、Co)磁性相的磁晶各向异性场降低。

 
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