晶

It can be concluded that there are twice recalescence in solidification process of Cu-20%Pb hypomonotectic alloy with undercooling in the range of 0K to 238K.

合金熔体深过冷凝固行为在固溶体类合金[1，2]、共晶类合金[3，4]、包晶类合金[5，6]和偏晶类合金等方面都有研究。

Dendrite cluster mode of growth occurs during recalescence if Ni-32. 5%Sn eutectic alloy is undercooled by larger than 10k or 〓 and 〓 alloys are undercooled by less than 480k and 110k respectively.

共晶成分的Ni-32.5wt％Sn（△T大于10k）、非共晶成分的〓（△T小于480k）和〓（过冷度小于110k）等合金再辉过程中以枝晶簇方式凝固。

Gscoh gs fsR, gscoh as the solid fraction when the formation of the continuous dendrite framework, fsR as the maximum solid fraction after recalescence,βs as the solidification shrinkage of the primary phase,μas the dynamic viscosity of the liquid, a as the length of L/S coexistence zone,λ2 as the secondary dendrite arm spacing, and tf as the total solidification time. High temperature recovery and recrystallization taking place in these fragments during further cooling results in the further grain size decrease.

本文通过对过冷DD3高温合金再辉过程中累积应力的计算，得到作用于初生枝晶的累积应力σs，可表示为：式中，gl是液相体积分数，gs是固相体积分数，gscoh是连续枝晶网络形成点对应的固相分数，fsR是再辉结束后固相分数，βs是快速凝固中液固收缩率，μ为液态合金的动力学粘度，a是再辉中液固共存区长度，λ2是枝晶二次间距，tf是总凝固时间，即再辉时间。

With increasing undercooling, the solidification microstructures of the alloys have changed, for example, grain refinement, transformation from regular rod eutectic structure to spherical anomalous eutectic grain structure with particulate morphology; while at higher undercooling, fine regular eutectic structure was observed.

随着过冷度的增加，其凝固组织发生了一系列的变化：晶粒逐渐细化，凝固组织从规则棒状共晶向异常粒状共晶组织转化，最后得到显微结构细小的胞状共晶团组织。

The grain model of SrTiO3 was designed based on their crystal habit for {111} and {100} planes as its major grain boundary; the shape may be different with the change of the relative area of the two boundary planes.

根据SrTiO3陶瓷中晶粒以{100}和{111}晶面为主要晶界的结晶习性，以及晶粒形状随{100}和{111}占晶界面积不同而发生变化的特点，设计了适合SrTiO3晶粒形状特征的晶粒模型。

By employing such a method, 5 series of elastomers, including natural rubbers, elastomeric polyester fibers and ethylene-octene, ethylene-methyl acrylate as well as SIS triblock copolymers, were investigated with the purpose of studying elongation induced phase structure and mobility changes of the samples. For NR samples, it was demonstrated that there exists a small amount of crystals at RT even for unelongated samples. For both NR and the soft segment of PEE, with the increase of elongation ratio, the elongation-induced crystallinity increases almost linearly in a certain region of R, in accord with the increase of the lamellar thickness of the crystals; The behavior of ethylene copolymers, in terms of elongation induced morphorpholgy changes, are quite different from NR and PEE. The crystals are found to be gradually destroyed with the increase of R, with accord with the decrease of the lamellar thickness; The motional behavior of the soft segment of SIS, changes from "liquid" to "solid", in terms of 13C NMR spin-lattice relaxation.For many of the aformented samples, the dependence of 13C spin-lattice relaxtion time T1 on R are different for different groups, indicating that the changes of mobility at MHz frequency region with elongation are different for different groups.

通过对天然橡胶、聚醚酯嵌段共聚物、乙烯-辛烯共聚物、乙烯-丙烯酸甲酯共聚物、SIS等高分子弹性体样品聚集态结构和分子运动的研究，获得了一些新的实验结果，如：给出了确切的实验证据，证明了室温下未拉伸的天然橡胶样品中存在着微量的结晶；发现随着拉伸比增加，天然橡胶及聚醚酯样品的软段部分会出现拉伸诱导的结晶，且结晶度在一定范围内呈现近似线性的增加，所形成晶片的厚度也随之逐渐增加；而乙烯共聚物随着拉伸比的增加，原有的结晶会被逐渐破坏，晶片厚度逐渐变薄，结晶中的缺陷逐渐增加；随着拉伸比的增加，SIS中PI软段部分的核磁共振弛豫行为会出现从液态到固态的转变等；在对上述多个体系的研究中，还发现不同基团的自旋-晶格弛豫时间随着拉伸比呈现不同的变化趋势，表明不同基团的高频运动随拉伸比增加有不同的变化规律。

Using the analysis of differential scanning calorimetry, three exothermic peaks were found which were mainly attributed to crystallization of α-(373℃), relaxation of internal strain (410℃) and crystallization of the residual amorphous matrix (540℃) respectively.

对机械合金化形成的非晶〓的DSC测量表明：在40℃到700℃范围内，有三个位于373℃，417℃和540℃左右的放热过程，分别α-相的结晶，内应变的降低和残余非晶相的晶化。

Since chemical composition and other characteristics are similar, it is quite diffictl to identify spinel from ruby and sapphires with unaided eye, which is the main reason that both gemstones have been confused long time.

尖晶石的呈色机理与红蓝宝石大体相同，化学成分和其他性质也很相似，靠肉眼来识别是不可能的，因此几世纪以来，二者一直混淆不清。不过，没有像黄色蓝宝石那样颜色的黄色尖晶石，因为使黄色蓝宝石至色的铁离子使尖晶石呈浅蓝或蓝绿色。

The ancient world couldn't tell ruby and spinel apart, but spinel's role as an unknown understudy keeps its price relatively low today even though a one-carat red spinel is more rare than a one-carat ruby.

古代世界说不出红宝石、尖晶石遥远，但尖晶石作为未知understudy守信今天虽然价格较低一克拉是红色尖晶石更为难得一比一克拉红宝石。

To meet the demands of a growing customer base, the company has an aggressive capacity build-out plan, including expansion of Fab 1 in Dresden and Fab 7 in Singapore, as well as construction of a new leading-edge 300mm facility in Saratoga County, New York.

为了满足日益壮大的客户群的需求，该公司制定了一项雄心勃勃的产能扩张计划，其中包括德累斯顿第1晶圆厂(Fab 1)和新加坡第7晶圆厂(Fab 7)的扩建，以及在纽约州萨拉托加县新建一家先进的300毫米晶圆厂。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。