Through analyzing the phase composition and microstructure of sm2fe17 - xnbx alloys ( x = 0 . 5 , 1 , 2 , 3 ) , we study the influence of the addition of element nb on the microstructure of sm2fe17 alloys . the results show that the as - cast structure of sm2fe17 - xnbx alloys can be improved effectively 本文重点研究了添加过渡族nb元素对sm - fe合金相组成和微结构的影响，实验研究发现：添加微量的nb元素可以有效的改善sm - fe合金铸态组织的显微结构。
The microstructure , structure , composition , phase of joint region , and the microstructure and composition of fracture have been analyzed using the equipment of metallurgical microscope , sem , eds , xrd and binary eutectic phase diagram for the al - cu system and diffusion theory 利用金相显微镜、扫描电镜、能谱仪、 x射线衍射分析仪，结合al - cu二元合金相图及扩散理论，分析了接头区域的形貌、组织、成分、相组成，以及断口形貌、成分。
Based on anti deflagration test method of coal industry standard mt378 - 1995 , influences of fuel oil phase and charge density and residual mass of acceptor explosive on anti deflagration of permissible expanded ammonium nitrate explosive have been tested in detail 摘要根据煤炭行业标准mt378 - 1995规定的抗爆燃性测试方法，详细地测试和研究了油相组成、被发药装药密度以及与之相对应的被发装药的残药量对煤矿许用膨化硝铵炸药抗爆燃性的影响。
The process of structure formation of acic is studied by means of xrd , sem and so on . meanwhile , the cause and mechanism of the acic compensating shrinkage have been analyzed , and the composition , structure and the rule of durability influence of acic have also been proved up 通过xrd 、 sem等微观测试手段研究了钢渣防渗抗裂混凝土的结构形成过程，分析其补偿收缩原因及机理，探明了钢渣防渗抗裂混凝土相组成、结构及其对耐久性的影响规律。
The liquid - liquid equilibrium data of ternary dem - ethanol - glycerin system have been determined at atmospheric pressure and different temperatures of 20 , 40 and 60 ? c , the conjugate phase compositions and thereout the contribution curves of this ternary liquid - liquid equilibrium system have been obtained 摘要在常压， 20 、 40 、 60下，测定了二乙氧基甲烷乙醇丙三醇三元体系的液液平衡数据，得到了三元液液平衡体系的共扼相组成并由此绘得相平衡曲线。
The azeotropic distillation of the system acetic acid - water - azeotropic agent ( isopropyl acetate and butyl acetate ) is simulated . due to the non - ideal behavior , nrtl - hoc and uniquac - hoc model is used to depict vapor - liquid phase equilibrium behavior of this system . concerning the liquid in the decanter , the stability is checked by tangent plane stability analysis , and the initialization of phase splitting calculation is produced . a good estimate of the phase fration is gotten by successive substitution with newton ' s method , and every component of two phase is gotten by mass equilibrium equation . finally , the solution of this equation is produced with successive substitution calcultion . the naphtali - sandholm method is used to simulation of azeotropic distillation . by virtue of this combined calculation method , the simulation is begun with operational data as basical data . the results of simulation accord with the operating data , which proved that the combined calculation method is credible 该体系具有高度非理想性，气液相平衡模型采用nrtl - hoc和uniquac - hoc模型，采用切平面判据法对进入分层器中的液相进行液相稳定性测试，提供液液相分离计算的初值，再结合牛顿拉夫森迭代法运算求得相分割系数，根据物料衡算求出各相组成，循环迭代可求得分层各组分数据，共沸精馏模拟计算采用那夫塔列-山德荷姆全变量迭代算法。
The morphology of powders is observed , with scanning electron microscopy ( sem ) and transmission electron microscopy ( tem ) . x - ray diffraction ( xrd ) pattern is used to analyze the phase of the composite powders . the copper nanoparticles / paraffin thermosensitive composite materials are obtained by the compress moulding 用扫描电镜( sem )对复合颗粒的表面形貌进行观察，分析颗粒的粒度、团聚情况等，用透射电镜( tem )观察分析了复合颗粒中铜的形貌、粒径及复合颗粒的精细结构， x射线衍射( xrd )分析复合颗粒物相组成。
In the section of non - pressing sintered , the influence of different raw material system and sintered temperature on the phase composition of the material were studied . and two conclusions were achieved . the one is that it is good for phase composition design and control because the final phase composition of the material fabricated by ti , sic and c raw material system is comparatively stable 在无压烧结阶段，研究了原料体系与工艺制度对材料物相组成的影响，结果表明使用ti 、 sic 、 c的原料体系得到的材料最终物相组成比较稳定，有利于进行材料组成设计与控制； 1500得到的材料中的杂质相含量较少，是比较合适的反应温度。
This article takes the chemical physics experiments " binary liquid - vapor equilibrium phase diagram " for the study , using the computer program to draw the liquid - vapor equilibrium phase diagram conveniently , and can extract composes is 0 . 75 time gas phase composition and the boiling point respectively is 0 . 5772 , 64 . 9737 文章采用计算机程序方便地绘出气液平衡相图，并求出了溶液组成为任意值时（以摩尔分数为0 . 75为例）的气相组成和沸点分别为0 . 5772 ， 64 . 9737 。
