摘要
通过DSC对Ti Ni和Ti NiCu记忆合金丝/镍基机敏复合材料的相变潜热进行了研究。结果表明,预应变Ti Ni试样在无约束状态下的第一次马氏体逆相变过程中,相变潜热值随预应变水平的增加而迅速增大,而在镍基体约束下,相变潜热值随预应变水平的增加而迅速减小。但Ti NiCu和Ti NiCu丝/镍基复合材料的相变潜热变化趋势与Ti Ni试样的明显不同。对上述现象给出了合理的解释。
The transformation heat of martensitie transformations in TiNi and TiNiCu wire/nickel composites is studied by differential scanning calorimetry（DSC）. Results show that the transformation heat of the first reverse martensitic transformation of prestrain TiNi specimen in a free condition is found to increase quickly with the increasing prestrain level. In comparison with this, the transformation heat of the first reverse martensitic transformation of prestrain TiNi specimen with nickel matrix is found to decrease quickly with the increasing prestrain level However, the transformation heat change trends of TiNiCu and TiNiCu wire/nickel composites are obviously different from that of TiNi and TiNi wire/nickel composites. The reason for these phenomena above is fully explained.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2009年第16期25-28,共4页
Materials Reports
基金
国家自然科学基金资助项目(50471021)
高等学校博士学科点专项科研基金(20050425002)
关键词
形状记忆合金
复合材料
转变热
示差扫描量热法
shape memory alloy, composites, transformation heat, differential scanning calorimetry
