粉末

The results show that nano-crystalline NiAl intermetallic compound can be synthesized by MA taking elemental powders of NixAl100-x(x＝25,30,40,50) as green reactants. Supersaturating solid solution NiAl intermetallic compound can be synthesized by MA using nonstoichiometric Ni-Al powders, and the synthesis mechanism is combustion reaction which includes forced solid solution based on atomic diffusion.

研究表明：NixAl100-x四种成分的元素粉末通过机械合金化方法均制备出纳米晶NiAl金属间化合物粉末；非化学计量配比成分的Ni-Al粉末通过机械合金化合成NiAl过饱和固溶合金，其机械合金化合成机理为含有以原子扩散为基础的强制固溶的燃烧合成反应。

Project Content and Scale: To adopt a mixed production transmission device of micro glass powder such as axle bush, the anti-abuse movement capacity of gears can be raised 2-3 times, especially in the condition of high-temperature without lubricant .About 70% of the world automobile gear is made in the way of metal powder metallurgy. However, utilizing method of pure metal powder metallurgy may cause a fatal weakness, that is, because sinter oxide membrane will arise among crystal, this may lower its intensity.

项目内容和规模：采用微玻粉末混合生产的传动装置如轴瓦，齿轮其抗磨蚀能力提高2—3倍，特别在高温无润滑条件下优势更为明显，全世界70%的汽车齿轮是用金属粉末冶金为法制造的，但纯金属粉末冶金件有一个致命弱点，因颗粒间会产生烧结结氧化膜而降低强度。

Crystal size and microstrain caused by mechanical alloying on Fe_(70)B_(30) powder were studiedby X-ray diffractometry and transrnission electronmicroscopy.

在机械合金化过程中球磨所造成的微观应变不大，球磨初期粉末的内应力随球磨时间增加而增加，当粉末粒子尺寸很小时，随球磨的进行粉末中的微观应变显著下降。

Carbide in the process of grinding, the powder will produce some waste, recycling all kinds of high-priced steel scrap tungsten carbide tool steel and tungsten, tungsten alloy Trim, grinding material, PCB waste bit, tungsten steel tool, used powder tungsten, tungsten steel powder, tungsten steel scrap, carbide grinding materials, including waste tungsten alloy grinding expected, the film cutter, drill, milling cutter , NC knives, cutting-tungsten steel mold, drawing die, a round cutter, saw, anvil, PCB bit, V-CUT knives, gongs, knives, a high proportion of alloy, non-magnetic alloy, tungsten steel powder, tungsten wire cutter Tungsten steel waste, and other tools.

硬质合金在打磨的过程中，会产生一些粉末废料，高价回收各种硬质合金钨钢报废工具以及钨钢、钨合金边角料、磨削料、废PCB钻头、钨钢工具、废钨粉、钨钢粉末、钨钢废料、硬质合金磨削料、含钨废料、合金磨削料、铣刀片、钻头、立铣刀、数控刀具、线切割钨钢模具、拉丝模具、圆切刀、锯片、顶锤、PCB钻头、V-CUT刀、锣刀、高比重合金、无磁合金、钨钢粉末、钨绞丝等各种钨钢废工具。

The disordered solid solution Al was obtained for Fe_(25)Al_(65)Ni_(10) mixture powder. The mechanical alloying of Fe_(0.25)Al_(0.75-x)Ni_x(x=0.05,0.175,0.25) mixture powders result in intermetallic compounds. The results of mechanical alloyed_(1-x)Ni_x (x=0.4,0.6) and (FeAl_3)_(1-x)Ni_x(x=0.1,0.3) mixture powders indicate that the ratio of iron and aluminum determines the formation of intermetallic compounds. The FeNi intermetallic compound, cerium oxide and one unidentified phase were obtained by mechanical alloying FeCeNi_3 and Ce_2 mixture powders.

对于合金化过程中的结构演变采用X射线衍射仪、DTA或DSC热分析仪、SEM进行分析，对Al-Fe-Ni和Ce-Fe-Ni两个三元系的机械合金化过程的研究表明：对于Al-Fe-Ni三元系来说，成分为Fe_(25)Al_(65)Ni_(10)的混合粉末经机械合金化后可生成非晶与纳米晶的混合物；球磨成分为Fe_(0.25)Al_(0.75-x)Ni_x(x=0.05，0.175，0.25)混合粉末，可形成Al_3Ni_2，AlFe_3，AlFe_(0.23)Ni_(0.77)，球磨成分为_(1-x)Ni_x(x=0.4，0.6)和(FeAl_3)_(1-x)Ni_x(x=0.1，0.3)混合粉末，Fe与Al比例相同时球磨所形成的金属间化合物也相同。

The experimental results indicate that friction coefficient of the Cu-MoS2 powder met...

研究结果表明：在有电流条件下，加入MoS2可显著降低铜基粉末冶金/铬青铜配副的摩擦因数和铜基粉末冶金材料磨损率，10%和20%MoS2含量的粉末冶金试样的磨损率相差不显著，20%MoS2含量的摩擦因数在高速时有所增加。

It is discovered that the strength of flexible metal cloth decreased with the increasing of the powders'size (45-180μm). The tensile strength of the cloth decrease from 72PSI to 3. 8PSI with the powder size increasing from 45μm to (125180)μm.

研究了金属粉末颗粒形貌、尺寸和连接物含量对金属粉末柔性布连接强度的影响，发现随着金属粉末颗粒尺寸的变大(45—180μm)，柔性布的强度会降低。

The isothermal kinetics of nanogram obtained by MA has been studied in section three. The grain growth of α solid solution of Fe〓CuNb〓Si〓B〓 powders is controlled by a single kinetics within the experimental temperature range, the activation energy for grain growth is 80.3kJ/mol, magnetic properties of powders at different annealing and milling conditions are measured, a preliminary effort has been given to the consolidation of Fe〓CuNb〓Si〓B〓 powders.

第三部分研究了机械纳米晶化粉末的等温晶粒长大动力学，在实验研究的温度范围内，Fe〓CuNb〓Si〓B〓纳米晶α固溶体的晶粒长大由单一的动力学过程所控制，其晶粒长大激活能为80.3kJ/mol，研究了不同球磨条件及热处理条件下纳米晶粉末的磁性，对纳米晶粉末的成型进行了初步的尝试。

The micron or sunmicon polymeric film formed on the powder surface is so strong that it reduced the chancs of cold welding between metal powder and causes the further deformation of metal powder at the later compaction stage.

在压制末期，聚合物在金属表面形成一层微米或亚微米级薄膜。这层薄膜与基体结合牢固，将金属粉末与粉末隔离开来，促进粉末的塑性变形。

For a higher packing fraction, a greater absorption strain was induced in the vessel packed with a larger initial powder size, while a greater desorption strain was present in the vessel packed with a smaller initial powder size.

在较高粉末填充率的情况下，较大的吸氢应变会出现在装填较大初始粒径粉末的储氢罐壁上，而较大的放氢应变则会出现在装填较小初始粒径粉末的储氢罐壁上。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。