【摘要】 研究了由Ｎｄ_２（Ｆｅ，Ｃｏ）_１４Ｂ和Ｎｄ_２（Ｆｅ，Ｃｏ）_１７双相组成的ＨＤＤＲ高矫顽力磁粉的微观结构及磁性。发现在单相Ｎｄ_２（Ｆｅ，Ｃｏ）_１４Ｂ化合物的基础上降低Ｂ含量，导致Ｎｄ_２（Ｆｅ，Ｃｏ）_１７相出现，且随Ｂ含量降低该相逐渐增多．适量的Ｎｄ_２（Ｆｅ，Ｃｏ）_１７相的存在对用性有一定有益的作用，过量则导致磁性严重恶化，这可能与该相的尺寸和存在形式密切相关．更多还原

【Abstract】 The microstructure and magnetic properties of coercive powder prepared by hydrogenation disproportionation desorption recombination method (HDDR) and composed of dual phase Nd2(Fe, Co)14B and Nd2(Fe, Co)17 alloy have been investigated. The decrease in B content in monophase Nd2(Fe, Co)14B alloy induced the formation of Nd2(Fe,Co)17 phase. The remanence Br, of dual alloy Nd12.5 Fe81.5-xCo6Bx with x= 5.2 is higher than that of monophase Nd12.5Fe81.5-xCo6Bx with x=5.88. This may be due to an exchange-coupling interaction between Nd2(Fe, Co)14B and Nd2(Fe, Co)17 phase.更多还原