相转变

Knittle et. al. propose perovskite is stable, whereas Mao et. al. consider it will transform to the mixture of magnesiowüstiteO and stishovite due to temprature effect.

例如，Knittle等人认为，钙钛矿型SiO〓是稳定的，在整个下地幔中可保持为单一相态；但Mao等人认为，由于温度的影响，它也可能转变成方镁石O与斯石英SiO〓的混合物相态。

The microstructure of materials depends on not only the phase selection at the onset of solidification, but also on the following microstructural evolution. In the present paper, the near equal atomic percent Ti-Al peritectic alloys were selected.

许多重要工程材料的液固相变都包含有包晶反应，而扩散控制包晶转变的程度直接影响最终组织中各相的组成、形态和分布。

The effect of 10% excess PbO addition on the phase transformation from pyrochlore to PbMg(subscript 1/3Nb(subscript 2/3)O3 was studied.

研究了10%过量的PbO对煅烧过程中烧绿石相向铁电相的转变作用，并在700℃锻烧5h条件下制备了不含烧绿石相的PbMg(下标 1/3Nb(下标 2/3)O3-CoFe2O4固溶体。

The results showed that heat treatment had no obvious effect on main linkage way of the system. Between 500℃and 900℃, the crystal phase CaF_2 was precipitated firstly, with the rising of temperature and the prolonging of time, crystal phases such as Al_2SiO_5、Ca_2SiO_4 and Ca_3(PO_4)_2 were precipitated sequentially and the powder was changed from dispersive spheroidic to irregular strip that linked each other, and congregated to irregular mass, gradually.

热处理对体系的主体键连方式无明显影响；在500-900℃温度范围内，粉体优先析出CaF_2晶相，随着加热温度的升高及保温时间的延长，依次析出Al_2SiO_5、Ca_2SiO_4、Ca_3(PO_4)_2等晶相，粉体由分散的近球形颗粒转变成相互粘连的不规则带状，并逐渐聚合成不规则块状；固结体抗压强度逐渐增加后趋于平缓。

In Au-RE systems,there are 13 stoichiometrical intermetallic compounds with RE∶Au ratio 1∶6,1∶5,1∶4,……2∶1,7∶3 and so on. The compounds have about 20 crystal structures with prototype like Au6Ho,Ag3.6Gd,MoSi2,CsCl and so on. The reduced transformation temperatures of various intermediate phases are inversely proportional to their average atomic volume construction.

在Au-RE系中出现有1∶6，1∶5，1∶4，……2∶1，7∶313种化学计量化合物和约20种晶体结构；中间相的简约转变温度与其平均原子体积收缩成反比趋势，且中间相原子体积收缩越大，其稳定性越高。

It is found that before the pearlitic and upper-bainitic reactions, a pro-cutectoid orpro-bainitic phase is precipitated along the austenite grain boundaries in the cyanidedsamples; and it is thought that this is likely a nitrogen-bearing phase which provides thephase boundary effect for the nucleation of the reactions and impoverishes the parentaustenite in alloy content, thus accelerating the transformation of austenite.

实验中发现，在珠光体及上贝茵体形成之前，氰化试样中均有一种过剩相沿奥氏体晶粒边界析出。这种先析相可能是一种含氮的化合物，其析出为珠光体及上贝茵体的非自发形核提供了现成的有利界面，并使奥氏体合金化程度降低，因而加速了转变。

This clearly indicts that it is through a transitional structure that structurally complex phases (crystalline approximant and quasicrystalline phases) can transform into an amorphous structure.

从这个结构依次变化的过程反映出，含有原子团的近似相或准晶在向非晶的转变过程中存在一个过渡的晶体相。

In this thesis, the phase diagram of Zn-Al binary system on 10~69.5 w% was reinvestigated by using differential scanning calorimeter, X-ray diffraction and pushrod dilatometer. The process of isothermal transformation during the aging of high-Aluminum-Zinc-based alloy was studied by using differential scanning calorimetry, and the aging behavior of the alloy was analyzed at the aspect of thermal analysis kinetics. The change of microstructure which the alloy was being heated was observed on high-temperature metallurgical microscope. The microstructure and wear-friction properties were compared among the alloys treated with several different heat treatment processes, and a model for heat treatment processes was proposed based on artificial neural network,so as to predict the relationship between friction coefficient and parameters of aging treatment such as aging temperature and time.

本文采用高温X射线衍射、示差扫描量热分析、热膨胀等方法重新测定含锌量范围为10％～69.5％的Zn-Al系二元相图，利用示差扫描量热分析法，研究高铝锌基合金时效等温转变过程，并从热分析动力学的角度分析高铝锌基合金合金时效行为；使用高温金相显微镜观察合金加热时的组织变化；比较几种不同热处理工艺对高铝锌基合金显微组织与耐磨性能的影响并利用人工神经网络建立高铝锌基合金热处理工艺模型，预测合金摩擦系数随时效温度及时间变化规律。

Reported a significant reduction in the rate of patient violence after transition to a remodelled ward compared with matched control wards.

报告一重要的在转变后的忍耐暴力的比率中的减少到被改造的守卫与相配的控制相较了守卫。

A transition phase was observed from the supercooled liquid region to 783 K.

在玻璃转变温度到783 K之间，观察到非晶基体中产生过渡相并转化为最终晶相的过程。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。