过冷度

电磁搅拌对Fe-C共晶合金石墨片间距与过冷度的影响

Influence of induction stirring on Fe-C eutectic lamellar spacing and supercooling

随着冷凝器进口空气温度的升高，蒸发压力、冷凝压力升高，而过冷度、过热度、制冷量和COP均线性下降；

With the increase of inlet air temperature of the condenser , evaporation pressure , condensation pressure increase , but supercooling and superheat degree , refrigerating capacity and COP decrease .

玻璃净化剂组分对Cu（50）Ni（50）合金熔体过冷度稳定性的影响

Effect of glass composition on undercooling stability of Cu_ ( 50 ) Ni_ ( 50 ) alloy melts

β-BaB2O4晶体生长熔液的挥发与其粘滞度和过冷度

Volatility , Viscosity and Supercooling of the Fluxed Melts for β - BaB_2O_4 Crystal Growth

由形核过冷度研究Ga熔体原子团尺寸变化的滞后性

Research on the hysteresis of atom cluster size variation in GA melt from the nucleation undercooling

发现磁场使纯金属Al的形核温度降低，即过冷度增大。

It was found that nucleation temperature of pure aluminum was reduced in magnetic field , namely , the undercooling level increased .

对等温面，CHF随过冷度的增加而增加。

For uniform temperature surface , the CHF increases with the subcooling .

结果发现：Ag、Cu和Ni的均质形核过冷度随着体积与冷速比值的增大而减小。

The results show that the homogenous nucleation undercooling of metals decreases with increasing ratio of sample volume to cooling rate .

对Al－4.5%Cu合金在纯石黑坩埚中用卤盐熔剂净化后的过冷度及其在金属锭模中的凝固组织特征进行了研究。

The undercooling and structure of the Al-4 5 % Cu alloy denucleated by the chloride flux in a fine graphite crucible is studied in this paper .

分析了Al熔体凝固过程的形核过冷度、以及α-Al形核与长大驱动力，探讨了凝固过程中α-Al细化机制。

The nucleation undercooling rate of aluminum melt , the driving force of nucleation and growth and refining mechanism of alpha aluminum phase during solidification were analyzed .

冷却速率增加，UHMWPE需更高的过冷度才能结晶。

The highly undercooled was need for UHMWPE crystallization with the increasing of cooling rate .

较大过冷度下，微观组织中发现有晶粒细化现象，这与Si晶体生长受溶质的抑制及初生相Si枝晶的断裂有关。

The microstructural refinement is observed at large undercooling , as a result of solute restriction of crystal growth and fragmentation of the primary silicon dendrites .

当冷凝温度相同时，2种制冷剂的COP、单位体积制冷量随过冷度的增大而增大。

In addition , COP and volumetric refrigerating capacity increased with increasing subcooled temperature at the same condensation temperature .

最后当过冷度进一步增大，Cu5%Cr过共晶合金获得绝对稳定平界面生长，生成超饱和的单相CuCr固溶体合金。

Finally , the monophase supersaturation solid solution of Cu-5 % Cr hypereutectic alloy develops in growth way of absolute stable planar interface with the further increase of undercooling .

在等温结晶实验中，在所测试的结晶温度范围内，随着过冷度的减小，DSC放热曲线趋于变缓，结晶完成时间延长，结晶速率减小。

In the isothermal crystallization experiment , the DSC exothermic curves become flat as decrease of the degrees of undercooling within the experimental temperatures .

并且，过冷度（TEN－TEU）越大，则产生石墨畸变和晶间碳化物的程度也越严重。

And the greater undercooling ( TEN-TEU ) is measured , the more seriously degeneration of normal spheroidal graphite and intercellular carbides are obtained .

脉冲电场对Pb-Sn合金熔体过冷度变化的影响

Effect of Pulse Electric Field on Undercooling Degree of Molten Pb-Sn Alloy

在实际试样制备过程中，由于存在较大的过冷度和溶质分布的不均匀性，TiC晶体可能形成各种不同的形态。

However during the actual sample preparation , because of the undercooling and inhomogeneity of the solute distribution , TiC crystal may have different morphologies .

此外用金属固液界面能模型预测了Ag、Cu和Ni在一定的体积与冷速比值下的均质形核过冷度。

Moreover , the dependences of homogenous nucleation undercooling on the ratio of sample volume to cooling rate for Ag , Cu and Ni were predicted according to solid-liquid interfacial energy model .

在相同的过冷度ΔT下，PET，PTT和PBT的结晶能力依次增强。

At the same undercooling degree (Δ T ), the crystallization capability of the three polyesters increase in a sequence of PET , PTT and PBT .

本文介绍了一套自行设计和组装的、高温热台显微镜实验装置，建立了一套高温溶液饱和点及自发成核温度测定法，测定了KTP一磷酸盐熔液溶解度曲线和过冷度曲线。

A set of high temperature microscope experimental apparatus designed and assembled by the authors has been described in this paper .

研究表明：对于偏晶合金，当过冷度<150K时，由于初生相L2的长大被抑制，形成Pb分布在α枝晶间的均匀凝固组织；

It indicates due to the growth of primary phase _L_2_ restrained , the microstructure with Pb distributed in interdendritic spacing is formed within undercooling less than 150 K ;

SEM、TEM和X&射线粉末衍射的分析结果表明，当初始过冷度大于60K时，所制试样为单相十面体准晶。

All the results of SEM , TEM and X-ray powder diffraction indicate that the sample undercooled more than 60K is the decagonal single-phase quasicrystal .

等温结晶的Avrami模型中，随着结晶温度的增长或者说随着过冷度的降低，结晶常数k降低，指数n增长。

In the Avrami model of isothermal crystallization , With the growth of the crystallization temperature or the reduce of the undercooling , constant k of the crystallization reduced and exponent n growth .

本文通过试验获取数据并对试验数据进行统计分析，建立了Al-Si合金在变质条件下的过冷度预测模型和微观组织的定量模型，并研究了Al-Si合金的潜热释放规律。

Based on the statistical analysis of the experimental data , the undercooling prediction models and the micro structure quantitative models of the modified aluminum silicon alloys are developed .

这可能是由于锶的加入，改变了液态金属的结构，导致枝晶尖端前沿生长过冷度增加，降低了枝晶α（Al）固液界面能。

The present of Sr in Al-Si alloys causes the changes of structures of liquid metals , and leads to the decreases of the solid-liquid interfacial energy of dendrite α( Al ) and increases of the growth undercooling of dendrite tips .

加入纳米TiO2起到了异相成核作用，PET/TiO2纳米复合体系只有TiO2含量为3%时的过冷度明显减小，结晶能力增强。

Nanometer TiO_2 was heterogeneous nucleation in the PET . The condensate depression decreased dramatically and crystallinity increased when the content of TiO_2 is 3 % of PET / nano-TiO_2 composites .

结果表明：大部分成核剂的加入对尼龙66熔点影响不大，而熔程ΔTm、结晶度和熔融熵降低；结晶峰值温度Tc升高，过冷度ΔTc和半高宽D降低；

The results showed most nucleating agents made the fusion range Δ T m , crystallinity and melting entropy decreased , while the crystallization temperature increased , the degree of supercooling and width at half-height decreased .

合金组织对冷却速度不敏感，具有遗传性，合金具有良好的韧性和塑性。电解Al-Si合金熔体为均质熔体，凝固时出现大的过冷度是形成变质组织的原因。

Self-modification in EASA is attributed to the occurrence of a severe undercooling during solidification , which is related with the formation of homogeneous melt and the electric current in electrolysis process .

研究表明细等轴晶的形成要求特殊的化学成分（含Zr，Li元素）和一定的凝固条件（小的成分过冷度）。

It was found that the existence of a particular solidification condition ( i.e. smaller constitutional undercooling degree ) as well as the elements of zirconium and lithium was necessary for the fine equiaxed smooth grains to form .