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为了研究急冷对储氢合金残余氢量的影响,利用真空电弧熔炼炉和铜模喷铸制备了Ti_(0.32)Cr_(0.345)V_(0.25)Fe_(0.03)Mn_(0.055)合金,采用XRD、PCT(压力-容量-温度)、TG/DTA等手段分析了急冷对储氢合金吸放氢性能的影响。结果表明,铸态合金和急冷合金均由BCC固溶体主相和Laves第二相组成;急冷对首次吸氢动力学行为影响较大,由铸态时的化学反应控制变为急冷时的新相晶核形成长大控制;急冷后,合金吸放氢平台压得到提高,且吸氢起始点左移,但吸放氢滞后性增大。TG/DTA曲线表明,急冷并没有改变合金的残余氢量,但氢化物放氢温度升高。
In order to study the effect of quench on the residual hydrogen content of hydrogen storage alloy, a Ti 0.32 Cr 0.345 V 0.25 Fe 0.03 Mn 0.05 O 5 alloy was prepared by vacuum arc melting furnace and copper die casting. XRD, PCT (pressure - capacity - temperature), TG / DTA and other means of quenching hydrogen storage hydrogen storage performance of hydrogen storage. The results show that both the as-cast alloy and the quenched alloy are composed of the main phase of BCC solid solution and the second phase of Laves. The quenching has a great influence on the kinetic behavior of the first hydrogen absorption. From the chemical reaction control during as-cast, After the quenching, the plateau pressure of hydrogen absorption and desorption is increased, and the starting point of hydrogen absorption is shifted to the left, but the hydrogen absorption and desorption retardation increases. TG / DTA curves show that the quench did not change the residual hydrogen content of the alloy, but the hydride release temperature increased.