相变

The crystal structure of NKN-LN and NKN-LT ceramics was investigated by XRD analysis, and the morphotropic phase boundary of the ceramics was also determined. It is revealed that the perovskite structure of NKN-LN ceramics transforms from orthorhombic phase to tetragonal phase when the LN content is 6%.

确定了体系的准同型相变的成分点，发现NKN-LN体系中随着LN增加在其含量达到6％时体系由正交相转变为四方相；NKN-LT体系在LT含量5％～7％范围内由正交相转变为四方相。

Dielectric, piezoelectric and electrmechanical coupling properties of PZT and PSZT systems at high Zr content region were studied. The feature of high Kt and low Kp of PZT-based materials near F-AF phase boundary was exploited and examined, and electromachanical coupling anisotropy Kt/Kp is higher than that at the morphotropic phase boundary , Kt≥0.40, Kt/Kp≥3. 0. This phenomenon can be realized by electric field -induced AF-F phase transition and explained by coupling effect of two-sublattice in antiferroelectric unit cell.

研究了PZT和PSZT两个系统在高锆区的介电、压电和机电耦合等性能，首次发现了PZT基材料在铁电-反铁电相界处具有高Kt和低Kp的性质，机电耦合各向异性Kt/Kp也比准同型相界要高，Kt≥0.40，Kt/Kp≥3.0，并把这一现象归因于电场诱导AF-F相变和反铁电双子晶格间的强耦合作用。

A phase-field model was built by optimizing characteristic parameters in the convec-tional phase-field model for peritectic transition, which is suitable to simulate microstructure evolution for peritectic transition of specific alloys.

通过对当前包晶相变相场模型特征参数的优化，建立了适合对具体合金包晶相变微观组织演化进行模拟的相场模型。

However, the coarsened and less dispersive Ti〓Ni〓 precipitates do not affect the morphology of the R phase and provide the preferred nucleation sites for the martensite, but they prevent the martensite from its auto-catalytic nucleation and growth and, consequently, the martensite develops discontinuously in a clustering nature.

低弥散度的粗片状Ti〓Ni〓相不影响R相的形貌，而且为马氏体相变提供优先形核部位，同时又制约马氏体的自促发成核和生长，以致使马氏体呈群团状的区域式不连续发展。

The former is believed to be the transformation of finer particles while the latter for coarser ones.

第二阶段相变是熟知的大颗粒单斜相到四方相的转变，它的发生伴随着大的体积收缩。

Wan Zhongmin ,Liu Wei, Zhang Liang, Ming Tingzhen （College of Energy and Power Engineering, H uazhong University of Science and Technology, Wuhan 430074）The operational behavior of small-scale flat-plate type capillary pumped loop at high heat fluxes was analyzed. The total pressure loss along the loop and maximum capillary pressure of the evaporator wick for different working fluids were obtained.

引言毛细抽吸两相流体回路是一种利用液体工质的相变进行传热传质的两相热控系统，具有结构简单，安置灵活，传热效率高，不需外加动力装置，运行可靠，传热温差小，热传输距离长以及传热能力强等优点，使其成为航空航天热控技术的有效方式[1 ]。

It is shown that thehigh temperature properties of this alloy are superior to those of other superalloysof the same type such as ЭИ787,ЭИ437Б, Nimonic 80 and 80A, etc.

组织结构的研究表明，应力加速相变过程，使γ′相发生定向聚集，使σ相和Laves相提前析出。

This result provides a new explanation to the so-called re-entrant integral quantum Hall effect.

此外，我们通过一个简化的模型，证明随着填充因子增加，从Bubble相到条纹相之间发生不连续相变。

Simulation results shows this model effectively depict the phase transition behaviors form free traffic flow state to congestion state in the network.

数值仿真结果表明，该模型能较好的描述了网络中从自由流相到拥塞相的相变行为。

According to the phase change law for wax deposition and dew point line curves, and the change of the saturation of condensate gas with phase properties, gas-liquid-solid was transformed with phase change, which would result in the change of distribution of fluid pressure and influence or alter the characteristic and the process of condensate gas percolation flow.

根据相的变化受析蜡线、露点线的相态变化规律控制，分析相变特性会导致储层内油气饱和度的变化，揭示蜡沉积在多孔介质表面引起孔隙性质改变和气、液、固在储集层中的微观空间分布会影响凝析气的流动特征。

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。