Pressure–composition–temperature hysteresis in C14 Laves phase alloys
2009; Elsevier BV; Volume: 480; Issue: 2 Linguagem: Inglês
10.1016/j.jallcom.2008.12.115
ISSN1873-4669
AutoresK. Young, T. Ouchi, W. Mays, B. Reichman, M.A. Fetcenko,
Tópico(s)Intermetallics and Advanced Alloy Properties
ResumoThis part of our series of papers reports our efforts to predict sealed cell cycle life from lattice constant a/c ratio and/or PCT hysteresis based on correlations established from our previous studies reported in Part 1. In the case of Ti21Zr12.5V14Ni21.5−xCr10Mn21Snx alloys, as x is increased the a/c ratio increases and the PCT hysteresis decreases resulting in extended cycle life for the battery. This is in agreement with the results from Part 1. In the case of Ti18Zr15.5V14Ni24.2−xCr10Mn18−ySn0.3CoxAly alloys, the a/c ratio trend was not observed due to existence of more than one C14 phase, but the correlation between PCT hysteresis and cycle life was maintained. In the case of Ti21Zr12.5V10Ni40.2Cr8.5−xMn5.6−yCo1.5+x+yAl0.4Sn0.3 alloys, the cycle life was dominated by the corrosive nature of the alloy affected by the Cr content. As a consequence, predictions from a/c ratio and PCT hysteresis can only be applied to the degree of pulverization in gas phase cycling and not to the sealed cell cycle life.
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