【摘要】 采用熔渣包覆水淬法获得了直径为 ６ ｍｍ，长度为 ５０ ｍｍ的非晶 Ｎｄ６０Ｆｅ３０Ａｌ１０合金，并对其非晶形成能力进行了研究．在三元系非晶合金中，除 Ｐｄ基合金外，这是目前所报道的采用水淬法所能获得的最大尺寸的非晶合金 对 Ｎｄ７０Ｆｅ２０Ａｌ１０，在同样的条件下可获得直径为 ３ ｍｍ，长度为 ５０ ｍｍ的部分非晶组织 与普通铜模铸造方法所获得的临界直径相比，前者提高了 ２ ｍｍ，而后者降低了 ４ ｍｍ．利用 ＤＴＡ 和 ＤＳＣ 对 Ｎｄ６０Ｆｅ３０Ａｌ１０合金的熔点和形成能力进行了分析，所计算的临界冷却速率为０．５５Ｋ／ｓ，表明该合金具有较大的非晶形成能力．表观晶化能计算结果和 ＤＳＣ曲线分析表明，Ｎｄ６０Ｆｅ３０Ａｌ１０非晶的热稳定性较低更多还原

【Abstract】 Bulk amorphous Nd60Fe30Al10 alloy with a diameter of 6 mm and length of 50 mm was prepared by water quenching the molten alloy together with B2O3 flux medium in an quartz tube. It is 2 mm larger in diameter than that fabricated by the copper mould casting previously. For bulk Nd70Fe20Al10 alloy, however, it contained certain crystalline phase(s) when fabricated into a sample with 3 mm in diameter and 50 mm in length by the same method, being at least 4 mm smaller in diameter than that fabricated by copper mold casting. For the water quenching bulk amophous Nd60Fe30Al10, its size is the largest except the Pd-based alloy in ternary alloy system. The calculated critical cooling rate is 0.55 k/s. The calculated apparent activation energy of crystallization as well as the results analyzed by DSC show that amorphous Nd60Fe30Al10 has a low thermal stability.更多还原