中文摘要：

为了研究制备方法对Mg70（Ni3La）30合金相结构和储氢性能的影响,分别采用熔铸法（自然冷却法）、浇铸法及快淬法制备了Mg70（Ni3La）30合金,发现随着冷却速率的增大,结晶相逐渐向低温转变,并且快淬法制备的Mg70（Ni3La）30合金为非晶合金。对该非晶合金进行退火处理后发现,在300℃时非晶相转变为Mg2Ni和La2Mg17晶体相,且晶化后的颗粒非常细小。通过PCT（合金吸放氢）曲线发现,快淬法制备的Mg70（Ni3La）30合金的储氢性能最好,浇注法次之,熔铸法最差。这与非晶合金晶化后的微观结构及高的储氢相有关。

英文摘要：

In order to research the effect of alloy preparation methods on the phase structure and hydrogen storage properties Mg70（Ni3La）30 alloys,the alloys were prepared by casting method,copper mould casting and melt-spinning technique respectively.Theresult showed that the low-temperature phase increased gradually with the cooling rate increasing,and it can form amorphous alloys using melt-spinning technique.The amorphous phase turned into Mg2Ni and La2Mg17 crystal phase after annealing treatments at573 K,and leaded to the finer particles during crystallization process.The melt-spunalloys had best hydrogen storage properties evaluated by pressure-composition isotherm（PCT） measurement among different preparation methods,the result related to the microstructure characteristics and high hydrogen storage phase after crystallization.