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燒結(jié)NdFeB永磁材料的力學(xué)性能及斷裂行為的各向異性
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TF125.8

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國家自然科學(xué)基金資助項目(59901010)


Anisotropy of Mechanical Properties and Fracture Behaviour in Sintered NdFeB Permanent Magnetic Materials
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    摘要:

    對從同一磁體上切取取向不同的3組燒結(jié)NdFeB試樣進行抗彎強度測定，對其抗彎斷口進行宏觀觀察和SEM觀察。對燒結(jié)NdFeB永磁材料的力學(xué)性能和斷裂行為的各向異性進行了研究。研究結(jié)果表明：燒結(jié)NdFeB永磁材料的抗彎強度和斷裂行為具有明顯的各向異性。不同取向方向試樣斷裂的微觀機制都主要為沿晶斷裂。當(dāng)取向方向沿抗彎試樣的長度方向時，在斷口上發(fā)現(xiàn)了明顯的穿晶解理斷裂，且該組試樣的抗彎強度值明顯低于沿其它兩個方向取向的試樣。

    Abstract:

    The bending strength of three groups of samples variously oriented with respect to the length direction of the parent bulk have been measured. The bending macrofractography was carefully observed using SEM. Both the mechanical properties and the fracture behavior of sintered NdFeB permanent magnetic materials were investigated and found to be strongly anisotropic. Intergranular fracture was the primary fracture micromechanism. Cleavage fracture has been clearly observed in the microfractography of the group of bending samples whose orientation was parallel to the length direction, and the bending strength of the corresponding samples was far lower than those of the transverse- oriented samples.

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李安華 董生智 李衛(wèi).燒結(jié)NdFeB永磁材料的力學(xué)性能及斷裂行為的各向異性[J].稀有金屬材料與工程,2003,(8):631~634.[Li Anhua, Dong Shengzhi, Li Wei. Anisotropy of Mechanical Properties and Fracture Behaviour in Sintered NdFeB Permanent Magnetic Materials[J]. Rare Metal Materials and Engineering,2003,(8):631~634.]
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  • 最后修改日期:2001-12-14
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