Well-aligned in situ composites in directionally solidified Fe-Ni peritectic system

作者：Su Yanqing^*; Luo Liangshun; Li Xinzhong; Guo Jingjie; Yang Huimin; Fu Hengzhi

来源：Applied Physics Letters, 2006, 89(23): 231918.

DOI：10.1063/1.2402236

Well-aligned in situ composites obtained in directionally solidified Fe-Ni peritectic system are formed by nonisothermal cellular coupled growth instead of isothermal coupled growth because of morphological instabilities. Peritectic coupled growth, with a plane interface like eutectic coupled growth, is always unstable due to the influence of peritectic reaction around the liquid/delta/gamma trijunctions. However, cellular nonisothermal peritectic coupled growth, in which one of the two solid phases bulges towards the liquid ahead of the other one, can reach a steady state and produce well-aligned in situ composites under proper growth conditions and sample composition.

• 出版日期2006-12-4
• 单位哈尔滨工业大学