共搜索到17421条信息，每页显示10条信息，共1743页。用时：0小时0分0秒749毫秒
and reactivity. The kinetic relationship of spreading ratio with spreading time was also investigated. Key words: wetting; interfacial reaction; precursor film CLC number: TG113.26; TG139.8 Document... is the same for the same system and experimental condition. In this paper, kinetic relationship of the spreading ratio α of the Zr55Cu30Al10Ni5/Al2O3 system with wetting time was investigated. 3......
size on wetting agent performance Two typical experimental results of various wetting agents to dust are shown in Figs.1 and 2. Fig.1 Penetrating time of wetting agents in different particle sizes of dust at various penetration depths (wetting agent solution 0.4%SDS; average water content of dust 0.39%; environmental temperature 31 ℃) Fig.2 Penetrating time of wetting agents in different......
glass phase forming. At the same time, the interfaces among the particles disappeared and the particles were melted together. Table 4 Relationship between wetting angle and temperature Fig. 4 Shape...J. Cent. South Univ. (2016) 23: 1541-1547 DOI: 10.1007/s11771-016-3206-x Melting, sintering and wetting properties of ZnO–Bi2O3–B2O3 sealing glass HE Feng(何峰)1, HE Zi-jun(何子君)2, XIE Jun-lin(谢峻林)1, 3......
......
with time. In contrast to the stock oil, although addition of polarity additive of long chain alkyl into stock oil is able to decrease the surface tension of solutions, it weakens the wetting dynamic... roughness, one aluminum substrate was only used. After testing every time, it was rinsed with analytic pure grade petroleum aether three times and dried by electric hair dryer. 2.2 Wetting......
of 1553 K. It was seen clearly that the contact angle of molten iron with prereduced ilmenites is time-independent, indicating the wetting is a nonreactive process. 3.4 Interfacial permeability of molten... Wetting between molten iron and prereduced ilmenite with carbon WANG Yu-ming(王玉明)1, 2, YUAN Zhang-fu(袁章福)1, ZHAO Hong-xin(赵宏欣)3, XIONG Shao-feng(熊绍锋)3, JIANG Wei-zhong(姜伟忠)2, LI Zhao-yi(李肇毅)2 1......
Results 3.1 Wetting process of molten Bi on Cu substrate Fig. 1 shows the variation of the contact angle (θ) with time for molten Bi on Cu substrate during isothermal exposure at 370 °C. The wettability... with the applied electric current at wetting time t may be expressed as (4) where γlv is the surface tension......
for surface mount com-ponent with the addition of 0.1% rare earth at soldering temperature of 250℃, preheating time of 15s and soldering time of 5s, i.e. it has higher wetting force and smaller wetting..., 即对润湿起了"隔离"作用. 因此, 随浸渍时间的继续延长, 润湿力稍有降低. 图5 润湿力随浸渍时间的变化曲线 Fig.5 Change curve of wetting force with soldering time 3 结论 采用商用水洗钎剂, 当Sn2.5Ag0.7CuxRE系钎料合金中RE添加量为0.1%时, 在钎焊温度250......
, spreading ratio, wetting time, and melting point, were investigated for verifying the effects of rare earth element Ce on solderabilities of micron-powdered Sn-Ag-Cu solder. The solidus and the liquidus... effect of the micron-powdered solder. By adding Ce into Sn-Ag-Cu alloy, its wetting time on pure copper can be obviously decreased. For the Sn-Ag-Cu-0.03%Ce, the soldering temperature is 250......
that the wetting properties of Sn-10Sb-5Cu solder are superior to those of 95Pb-Sn solder in maximum wetting force, wetting time and wetting angle in the temperature range of 340-400 ℃. However, the surface...Wetting Behaviors and Interfacial Reaction between Sn-10Sb-5Cu High Temperature Lead-free Solder and Cu SubstrateQiulian Zeng 1,2) , Jianjun Guo 1) , Xiaolong Gu 1) , Xinbing Zhao 2) and Xiaogang Liu......
