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鋱含量對(duì)耐熱釹鐵硼永磁材料的磁性能的影響
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TM273.014

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航空工業(yè)總公司委托國(guó)家軍工配套項(xiàng)目


Influence of Elastic Interaction Among T 1(Al 2CuLi) Precipitates on the Stability and Nucleation of Precipitates in Aluminum Lithium 2090
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    摘要:

    研究了重稀土元素鋱（Ｔｂ）的含量對(duì)末冶金燒結(jié)耐熱型（Ｎｄ，Ｄｙ，Ｔｂ）２（Ｆｅ，Ｃｏ，Ｎｂ，Ｇａ）１４Ｂ永磁材料的乘磁（Ｂｒ）磁化強(qiáng)度矯頑力（Ｈｃｊ）和溫度系數(shù)（μＢｒ）的影響。實(shí)驗(yàn)中，采用Ｔｂ等量取代原合金中的一部分Ｄｙ，實(shí)驗(yàn)結(jié)果表明，Ｔｂ含量在０ａｔ％～０．８６％ａｔ％范圍內(nèi)，隨著合金中Ｔｂ含量嗇式樣的Ｈｃｊ顯著增加，αＢｒ則顯著減小，Ｂｒ基本上沒(méi)有變化。當(dāng)Ｔｂ增加到０．８６ａｔ％時(shí)，Ｂｒ仍然

    Abstract:

    The distribution of T 1 precipitates at the subgrain boundaries and the nucleation of secondary precipitates in the alloy aluminum lithium 2090 have been studied using TEM. The results show that the aspect ratios of the T 1 phase particles which precipitate at the subgrain boundaries is similar to or even smaller than those of nearby T 1 phases, indicating limited coarsening of the T 1 phase. It is calculated that this result conforms to the Perovic criterion, i.e. that it is necessary to balance the elastic interaction energy among the T 1 precipitates in order to stabilize the distribution of the T 1 precipitates. Small T 1 precipitates always appear at the intersection between existing T 1 phases where the nucleation energy of the T 1 phase is lower

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石永金 張小立.鋱含量對(duì)耐熱釹鐵硼永磁材料的磁性能的影響[J].稀有金屬材料與工程,1999,(4):236~239.[Zhao Zhilong, Chen Zheng. Influence of Elastic Interaction Among T 1(Al 2CuLi) Precipitates on the Stability and Nucleation of Precipitates in Aluminum Lithium 2090[J]. Rare Metal Materials and Engineering,1999,(4):236~239.]
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