The effects of annealing treatments on the structure and mechanical properties of cobalt electrodeposits have been studied. Annealing temperatures range from 250-800 degrees C, i.e. below, as well as above, the allotropic alpha-h c p reversible arrow beta-f c c transformation temperature (417 degrees C). The structural characterization included hydrogen content measurement, relative volume fraction of a and p phases determination by X-ray diffraction, and microstructural investigations by optical and electron microscopy. The results showed that an annealing is a very effective means to optimize the ductility of cobalt electrodeposits. The increase of ductility observed after annealing is essentially due to a decrease of the stacking fault density in the deposits. Annealing treatment above the allotropic transformation temperature also produces, in some deposits, an increase of the ductile beta-f c c phase content, but this fact does not lead to supplementary improvements of ductility. This is due to the detrimental influence of hydrogen that always exists in these deposits. (C) 1998 Kluwer Academic Publishers. [References: 24]
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机译：研究了退火处理对钴电沉积结构和力学性能的影响。退火温度范围为250-800摄氏度，即同素异形α-hc p可逆箭头beta-f c c转变温度（417摄氏度）以下以及之上。结构表征包括氢含量测量，通过X射线衍射确定a和p相的相对体积分数以及通过光学和电子显微镜进行的微观结构研究。结果表明，退火是优化钴电沉积延性的一种非常有效的方法。退火后观察到的延展性增加主要是由于沉积物中堆积缺陷密度的降低。在同素异形转变温度以上进行退火处理，在某些沉积物中还会增加塑性β-fc c相的含量，但这一事实并未导致塑性的补充改善。这是由于这些沉积物中始终存在的氢的有害影响。 （C）1998 Kluwer学术出版社。 [参考：24]
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