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chemical constitution
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    The efflorescence rate of MnAl25 intermediate alloy is 0.01%,and its density can reach to 4.41g/cm3.The efflorescence rate of MnAl15 intermediate alloy is 0.02%,and its density reaches to 4.80g/cm3.The chemical constitution of Mn-Al intermediate alloy is uniform.
    MnAl25中间合金的粉化率为0.01%,密度可达4.41g/cm3; MnAl15中间合金的粉化率为0.02%,密度可达4.8g/cm3,且中间合金的成分均匀。
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    2u-MgF2 cermet films with different components were prepared by RF magnetron sputtering in order to ensure their chemical constitution.
    采用射频磁控共溅射镀膜技术制备Cu的体积百分比q_M分别为0%、5%、10%、15%、20%、30%和100%(直流磁控溅射法制备)的Cu-MgF_2复合纳米金属陶瓷薄膜。
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  chemical constitution
The very lowQ can be explained by changes in the chemical constitution taking place in the uppermost mantle.
      
Since the properties of insulators are so strongly dependent on their crystallographic and chemical constitution the methods of film preparation determine to a considerable extend their characteristics.
      
The model is used to predict the effects of changes of bed voidage, physical properties, and chemical constitution of the sinter and the effects of gas and solids flow maldistribution on the operation of the furnace.
      
The chemical constitution of tribofilms, generated from zinc dialkyldithiophosphate (ZDDP) and ashless dialkyldithiophosphate (DDP), has been examined by X-ray Absorption Near Edge Structure (XANES) spectroscopy.
      
Chemical constitution of 3d complexes and rate constants of ortho-para positronium conversion reactions
      
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The microstructure of a hard metal affects its properties to a considerable de- gree,besides the chemical constitution of the hard metal.The study shows that,control of the optimal sintering time and use of oil quenching can change the boundary morphology of the wolfram carbide phase from edge form into smooth form,as a result the properties of the hard metal can be improved.

硬质合金材质的好坏,除受成分支配外,在很大程度上还受其显微组织的影响。使用最佳烧结时间和采用油中淬火冷却方式,可以使原棱角形的碳化钨晶粒变为圆滑的晶粒,从而可以改善硬质合金的性能。

The structure and the thermal properties of ultra-high molecular weight polyacrylonitrile (UHMW-PAN) prepared by suspension polymerization were measured by FTIR, viscosity method, GPC, 13 C-NMR, X-ray diffraction and TGA. The chemical constitution and molecular weight of UHMW-PAN were determined. It was found that the tacticity, crystallinity and thermal stability of UHMW-PAN are higher than ones of nomal PAN, therefore UHMW-PAN is a good membrane materials.

本文采用 FTIR、粘度法、GPC、1 3C- NMR、X-射线衍射和 TGA等方法 ,对通过悬浮聚合制备的超高分子量聚丙烯腈 (UHMW- PAN)的结构和热性能进行了测定 ,确定了其化学组成和分子量 ,发现其立体规整度、结晶度和热稳定性高于常规聚丙烯腈 (PAN) ,是制备中空纤维膜的较理想材料。

In this paper, the mathematical treatment of interrelation of hardenability and chemical constitution for 20CrMnTiH,40MnBH, 20mMnVBH steels. It was investigated by mathematical stepwise regression. The result showed that interval of hardenability zone depends on variable quantity of the chemical constitution.

在测定 2 0CrMnTi、4 0MnBH、2 0MnVBH钢淬透性及试样的化学成分基础之上 ,利用计算机采用逐步回归分析方法进行了回归运算 ,得到淬透性与化学成分的关系———回归方程 ,根据回归方程求出了不同窄淬透带规格所对应控制的化学成分范围

 
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