摘要
研究了Ｎｄ－Ｆｅ－Ｂ合金的组织与组成对其腐蚀行为的影响。对Ｎｄ－Ｆｅ－Ｂ合金各主要组成相在纯水和ＮａＣｌ溶液中电位进行了测定，结果表明Ｅ（富Ｎｄ相）＜Ｅ（基体相）＜Ｅ（富Ｂ相）。Ｎｄ－Ｆｅ－Ｂ合金的腐蚀特征是晶界处的富钕相优先腐蚀，然后向晶粒内Ｎｄ２Ｆｅ（１４）Ｂ基体相扩展。环境腐蚀试验结果表明，Ｎｄ－Ｆｅ－Ｂ合金中加入Ｄｙ后，耐蚀性提高；加入Ａｌ后，则耐蚀性有所下降。
The effects of composition and structure on corrosion behavior ofNd-Fe-B alloy have been studied.The potentials of all main phase of Nd-Fe-B alloy in pure water and NaCl solution were measured.The order of potential is E(Nd-rieh)<E(Nd2Fe14Bmajor phase)<E(B-rich).The corrosion characteristic of Nd-Fe-B permanent alloy is that the Nd-rich grain boundary phase in the alloy is easier to be corroded than the Nd2Fe14B grain phase.The`experiment results of eviromented corrosion tests showed that the corrosion resistance of the Nd-Fe-B alloy in solution is improved by the addition of Dysprosium,but reduced by the addition of Aluminium to the alloy.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1994年第A01期77-82,共6页
Journal of University of Science and Technology Beijing
基金
国家自然科学基金
关键词
腐蚀
组织
硬磁合金
化学成分
Nd-Fe-B alloy, corrosion,structure,composition
