Nitrogenation effect of Nd(Fe,Mo)12 alloys prepared by strip casting technique
Nitrogenation effect of Nd(Fe,Mo)12 alloys prepared by strip casting technique
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DOI：
10.1016/j.jallcom.2010.07.095
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发表时间：
2010-09
影响因子：
6.2
通讯作者：
Xiangpeng Kong;Jingzhi Han;Shunquan Liu;Zhong Lin;Changsheng Wang;Jinbo Yang;H. Du;Yingchang Yang
中科院分区：
文献类型：
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作者：
Xiangpeng Kong;Jingzhi Han;Shunquan Liu;Zhong Lin;Changsheng Wang;Jinbo Yang;H. Du;Yingchang Yang
采用带铸法制备了nd1.1 fe10.5 mo1.5合金，并利用铸带合成了氮化物。结果表明，可以直接对ndfe10.5 mo1.5条带进行氮化处理，得到间隙型ndfe10.5 mo1.5 nx化合物，无需预破碎。首次发现了氮化引起带材自发粉化的现象。这种粉碎可能是富nd相沿晶界的晶间破坏和初生相NdFe10.5Mo1.5的穿晶破坏造成的，不同于以穿晶破坏为主的带材机械破碎。利用氮化带制备各向异性ndfe10.5 mo1.5 nx粉末，得到了剩余物（Br）为1.08T，矫顽力（iHc）为400kA/m，能量积（BH）max为144kJ/m3的各向异性ndfe10.5 mo1.5 nx粉末。结果表明，采用一种新的更简单的工艺路线，无需预破碎即可制备高性能的ndfe10.5 mo1.5 nxnit化物。
Nd1.1Fe10.5Mo1.5alloys are prepared by strip casting technique and their nitrides are synthesized using the cast strips. It is found that the NdFe10.5Mo1.5strips can be directly nitrided to obtain interstitial NdFe10.5Mo1.5NXcompounds without pre-crushing. A phenomenon of spontaneous pulverization in the strips induced by nitrogenation is found for the first time. This kind of pulverization may result from the inter-granular failure along the grain boundary of Nd-rich phase as well as trans-granular failure of primary phase NdFe10.5Mo1.5, which is different from mechanical crushing of the strips where trans-granular failure is dominant. The nitrided strips are used to prepare anisotropic NdFe10.5Mo1.5NXpowders, and the anisotropic powders with a remanence (Br) of 1.08T, a coercive force (iHc) of 400kA/m, and an energy product ((BH)max) of 144kJ/m3are obtained. The results show that high performance NdFe10.5Mo1.5NXnitrides can be prepared by a new and simpler technical route without pre-crushing.