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通过实验测试及动力学机制方程拟合,研究了放电等离子烧结Zr-x Cu(x=0,5%,10%,质量分数)合金吸氘动力学机制.结果表明,随着合金元素Cu的加入,相结构由纯Zr的a-Zr单相转变为Zr-Cu合金的a-Zr和Zr_2Cu双相.相应地,其吸氘达到饱和的时间逐渐延长,由纯Zr的20 min增加到Zr-5%Cu的80 min和Zr-10%Cu的130 min,吸氘后的纯Zr相结构为氘化物e,而Zr-Cu合金相结构为e相、Zr_2Cu和Zr_7Cu_(10).动力学机制方程拟合结果显示,纯Zr吸氘过程受二维扩散机制控制,而Zr-Cu合金吸氘过程受化学反应机制控制.Cu的加入改变了其吸氘机制,从而降低了吸氘速率.
The kinetics of deuterium absorption of Zr-x Cu (x = 0, 5%, 10%, mass fraction) alloys by spark plasma sintering was studied by means of experimental tests and kinetic mechanism equations. The results show that with the alloying of Cu , The phase structure changes from a-Zr single phase of pure Zr to a-Zr and Zr_2Cu dual phases of Zr-Cu alloy. Correspondingly, the time to saturation of deuterium absorption gradually increases from 20 min of pure Zr to Zr The pure Zr phase after deuterium absorption was deuterated e for 80 min of -5% Cu and 130 min of Zr-10% Cu, while the phase structure of Zr-Cu alloy was e phase, Zr_2Cu and Zr_7Cu_ (10) The fitting results of the mechanism equation show that the pure Zr deuterium absorption process is controlled by the two-dimensional diffusion mechanism, while the deuterium absorption process of the Zr-Cu alloy is controlled by the chemical reaction mechanism, and the addition of Cu changes its deuterium absorption mechanism, thus reducing the deuterium absorption rate.