摘要
将DSC技术与助熔剂(BaCl2)处理技术相结合,在不同温度下原位测试了Ni镀层熔体的过冷度。在1849K温度下(冷却速率为20K/min)获得了Ni镀层熔体的最大过冷度为411K。冷却速率在10K/min～50K/min范围内,冷却速率越大,过冷度越大。当冷却速率一定的情况下,过冷度随熔体处理温度的提高而增大,并逐步趋向于恒定。分析了Ni镀层熔体的结晶率与温度、冷却速率和时间的关系。
The undercoolings of Ni-coating melt with different temperatures were in situ tested within differential scanning calorimeter facility by a flux technique. The highest undercooling obtained in this way was 411 K. The undercooling increased with the increasing of cooling rate in rang of 10 K/min-50 K/rain and melt treatment temperature at the same cooling rate, then held a constant. The relationships between crystallize rate and temperature as well as cooling rate and time were analyzed. It shows that a faster cooling rate results in a shorter time needed to finish the melt crystallization.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第8期1208-1210,共3页
Rare Metal Materials and Engineering
基金
河北省自然科学基金(598250)
关键词
DSC
助熔剂处理
Ni镀层过冷
凝固
differential scanning calorimeter
flux technique
undercooling of Ni-coating
solidification
