排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
Robert G. Laughlin 《Journal of the American Oil Chemists' Society》1990,67(11):705-710
Recent phase studies of several surfactant-water systems, using new or refined methods, have revealed significant errors in
earlier phase diagrams. These diagrams had been determined largely using methods based on the isoplethal phase studies principle.
This principle has inherent limitations which do not exist in isothermal methods.
Isothermal nuclear magnetic resonance and refined calorimetric methods have been extensively used in recent surfactant phase
studies. Methods based on the new lyotrope gradient (swelling) principle show great promise as a means of improving the efficiency
and quality of surfactant phase studies. 相似文献
2.
Investigation of the Phase Equilibria of Sn-Cu-Au Ternary and Ag-Sn-Cu-Au Quaternary Systems and Interfacial Reactions in Sn-Cu/Au Couples 总被引:1,自引:0,他引:1
Yee-Wen Yen Chien-Chung Jao Hsien-Ming Hsiao Chung-Yung Lin Chiapyng Lee 《Journal of Electronic Materials》2007,36(2):147-158
The phase equilibria of the Sn-Cu-Au ternary, Ag-Sn-Cu-Au quaternary systems and interfacial reactions between Sn-Cu alloys
and Au were experimentally investigated at specific temperatures in this study. The experimental results indicated that there
existed three ternary intermetallic compounds (IMCs) and a complete solid solubility between AuSn and Cu6Sn5 phases in the Sn-Cu-Au ternary system at 200°C. No quaternary IMC was found in the isoplethal section of the Ag-Sn-Cu-Au
quaternary system. Three IMCs, AuSn, AuSn2, and AuSn4, were found in all couples. The same three IMCs and (Au,Cu)Sn/(Cu,Au)6Sn5 phases were found in all Sn-Cu/Au couples. The thickness of these reaction layers increased with increasing temperature and
time. The mechanism of IMC growth can be described by using the parabolic law. In addition, when the reaction time was extended
and the Cu content of the alloy was increased, the AuSn4 phase disappeared gradually. The (Au, Cu)Sn and (Cu,Au)6Sn5 layers played roles as diffusion barriers against Sn in Sn-Cu/Au reaction couple systems. 相似文献
1