查询词典 Dendrites

The measured dynamitic solidification curve shows that the mushy zone become wider with the increase of Al amount and fluidity decreases as the well developed dendrites hinder the flow of the liquid alloy.

合金的液相线温度随Al量的增加而降低，Al含量从24%增至35%时，其过热度约增加1倍。

The Equiaxed non-dendrites are considered to form through a peritectic reaction mechanism.

等轴非枝晶的形成机制被认为是&包晶反应机制&。

It was found that a small amount of α-Fe dendrites with equiaxed morphology existed in specimens grown at 200 and 500 μm/s.

中文摘要：对Nd14Fe79B7合金进行了定向凝固试验与形核有关的凝固组织形成研究。

An EPMA was performed quantitatively on the influence of Ce upon the Mn segregation in cellcrystals, columnar and Equiaxial dendrites of high-Mn steel.

与此同时，用电子探针微区分析考察了Ce对高锰钢中Mn在胞晶、柱状树枝晶及等轴晶内偏析的定量影响。

Solute diffusion controlled solidification model was employed to simulate the columnar to equiaxial transition of TiAl alloy casting. The simulation results show that solute shock wave occurs when the diffusion fields of columnar and equiaxial dendrites meet.

利用溶质扩散控制模型对TiAl合金柱状晶/等轴晶转变过程进行了数值模拟，结果表明，等轴晶在柱状晶前沿形核及生长过程中，当两个扩散场相遇时，观察到成分冲击波，它可能是导致柱状晶停止生长的一个主要原因。

For supercooling directional solidification, ideal directional microstructure can be obtained only within the supercooling range 63～83K and 127～170K. These two supercooling ranges just corresponds to the supercooling for developed equiaxial dendrites in ordinary supercooling solidification.

6对于深过冷定向凝固来说，只有在63～83K的低过冷度范围和127～170K的中过冷度范围才能获得理想的定向生长组织，而这两个过冷度范围正好对应于深过冷熔体凝固组织为发达的等轴枝晶的过冷度范围，这种组织的相似性似乎与过冷度一样具有遗传性。

The eutectic temperature and the amount of proeutectic austenite dendrites are essentially unchanged with the variation of solidification rates in hypoeutectic white iron.

随凝固速度增加，亚共晶灰铸铁的共晶温度下降，初生奥氏体枝晶的数量和发达程度随之增加。

It can avoid the oversaturation of zincate solution, improve thecharge-discharge properties, inhibit dendrites formation, increase discharge capacity and extendcycle life of zinc electrode effectively.

泡沫黄铜集流体还具有导电性好、孔隙率高、比表面大、重量轻、价格低廉、无污染等优点，是一种各项性能均衡，与银集流体相近的锌镍电池负极新型集流体。

Zn-La alloys increase the overpotential ofhydrogen evolution, Tafel slope 〓 and polarization, decrease the corrosion current density, inhibitthe corrosion of zinc electrode in alkaline solution, decrease anode Tafel slope 〓, promotedischarge reaction of zinc electrode, have higher passivation current density, inhibit thepassivation of zinc electrode, avoid the oversaturation of zincate in electrolyte, greatly increase〓 diffusion coefficient, decrease Tafel slope 〓, polarization and the overpotential of deposition,inhibit the dendrites formation and improve the electrodepostion of Zn.

实验结果表明，Zn-La合金电极显著改善了锌电极的各项电化学性能：提高析氢过电位、析氢过程Tafel斜率〓和极化，减小腐蚀电流密度，抑制锌电极在碱液中的腐蚀；降低阳极Tafel斜率〓，促进了锌电极的放电反应；具有较高的维钝电流密度，抑制锌电极的钝化；有效避免了溶液中锌酸盐的过饱和现象：使〓的扩散系数明显增大：降低Zn沉积过程的Tafel斜率〓、极化和沉积过电位，明显抑制锌枝晶的生长，改善了锌的电沉积性能。

The results show that if the initial crystal nucleus is not melted, its size has nothing to do with the simulation results. With the coefficient of interfacial anisotropic strength increasing, the dendritic tip's growing speed increases linearly, while its radius decreases parabolically. The lower the sub-cooling degree is, the more difficult it is to find secondary dendrites.

结果表明：在保证初始晶核不被熔化的前提下，初始晶核半径r0的大小不影响模拟结果；随着界面各向异性系数的增大，枝晶尖端生长速度以线性方式增大，而枝晶尖端半径以抛物线方式减小；过冷度越小，枝晶的生长越困难，越不能出现二次枝晶。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。