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Trans. Nonferrous Met. Soc. China 26(2016) 2633-2640 Effects of melt overheating degree on undercooling degree and amorphous forming of Nd9Fe85-xTi4C2Bx (x=10, 12) magnetic alloys Meng-lin YANG, Jing... Abstract: The effects of melt overheating degree on the undercooling degree and resultant solidification structures of Nd9Fe85-xTi4C2Bx (x=10, 12) glass-forming alloys were studied by differential thermal......
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Sn-3.5Ag/Cu体系早期界面反应及凝固过冷行为周敏波1,李勋平1,马骁1,张新平1(1.广东省广州市华南理工大学材料科学与工程学院)摘 要:利用差示扫描量热分析法结合焊点回流过程,研究了无Pb钎料Sn-3.5Ag与Cu基底构成的Sn-3.5Ag/Cu体系模拟焊点中早期界面反应及焊点形成过程中钎料熔化和凝固特性.结果表明,加热过程中Cu向钎料合金侧的固态原子扩散导致界面生成低熔点Sn-Ag-Cu三元合金,使焊点界面在低于Sn-3.5Ag钎料熔点温度近4℃时即开始熔化;早期界面反应促使润湿过程提早发生并生成了......
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Interlamellar spacing and average interface undercooling of irregular eutectic in steady-state growth MENG Guang-hui(孟广慧), LIN Xin(林 鑫), HUANG Wei-dong(黄卫东) State Key Laboratory...; Abstract: The average lamellar spacing and interface undercooling in steady-state irregular......
to measure the undercooling of liquid iron during solidification. The relations between the cleanness of liquid iron and undercooling, thermodynamic driving force of nucleation, the nucleus forming energy, as well as the critical radius of nucleus have been investigated. The results showed that with the increase of cleanness of liquid iron the undercooling and thermodynamic driving force increased......
is established to simulate the concentration field in irregular lamel-lar eutectic of Al-Si system.Both the undercooling and spacing are dependent on thegrowth rate and the temperature gradient,and increasing growth rate causes an in-crease of undercooling but a decrease of lamellar spacing,while increasing temperaturegradient leads to a decrease of lamellar spacing.The computed results......
探析综采工作面末采末放支护形式王红兵1,张路霞21. 晋城煤业集团古书院矿综采三队2. 濮阳职业技术学院机电工程系摘 要:主要对综采工作面末采末放所采用的网-绳-梁和网-梁-梁两种支护工艺进行了论述,并对其技术性,经济性,安全性进行了分析和比较,确定了综采工作面合理的末采末放支护形式.关键词:综采工作面;末采末放;支护;网-绳-梁;网-梁-梁;......
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