金属学报  1983, Vol. 19 Issue (5): 65-154

论文 本期目录 | 过刊浏览 |

Sm(Co, Cu, Fe, Mn)_(7.8)永磁体铸造结晶组织及Cu偏析对矫顽力的影响

蒋景凯;肖连芳;王家海

包头冶金研究所;包头冶金研究所;包头冶金研究所

EFFECTS OF AS-CAST CRYSTALLINE STRUCTURE AND Cu SEGREGATION ON COERCIVITY OF Sm (Co, Cu, Fe, Mn)_(7.8) PERMANENT MAGNET

JIANG Jingkai; XIAO Lianfang; WANG Jiahai (Baotou Research Institute of Metallurgy)

蒋景凯;肖连芳;王家海. Sm(Co, Cu, Fe, Mn)_(7.8)永磁体铸造结晶组织及Cu偏析对矫顽力的影响[J]. 金属学报, 1983, 19(5): 65-154.
, , . EFFECTS OF AS-CAST CRYSTALLINE STRUCTURE AND Cu SEGREGATION ON COERCIVITY OF Sm (Co, Cu, Fe, Mn)_(7.8) PERMANENT MAGNET[J]. Acta Metall Sin, 1983, 19(5): 65-154.

摘要 参考文献 相关文章 Metrics 全文: PDF(1620 KB)   摘要: 本文研究了Sm(Co, Cu, Fe, Mn)_(7.8)永磁体铸造结晶组织及Cu偏析对矫顽力的影响。结果表明,不同冷却速度的铸造合金锭具有不同的结晶组织。在等轴晶组织中,晶内贫Cu,晶界上富集游离Cu,保存有一些Sm_2Co_(17-x)T_x六方结构高温相,造成矫顽力下降;而在细的柱状晶组织中,无严重的成分偏析。经烧结和固溶处理后的磁体,为位错胞状显微组织,胞壁间弥散着脱溶Cu和富Cu的SmCo_(5-x)T_x相,它们在反磁化过程中,可能对畴壁起着钉扎作用,因而具有高矫顽力。 Abstract：Effects of the as-cast crystaline structure and segregation in Cu on the coercivity of Sm(Co, Cu, Fe, Mn)_(7.8) permanent magnets have been investigated. Experimental results showed that the crystalline structure of the ingot is different with different cooling rates. In the equi-axed grain structure, the inner of the grain is deficient in Cu; free Cu concentrates on the grain boundaries, where an amount of high temperature phase of hexagonal structure of Sm_2Co_(17-x)T_x is preserved, resulting in a decrease in the coercivity. In the fine-columnar grain structure, no serious segregation in composition has been observed. Magnets after sintering and solution treatment exhibit the cellular microstructure; precipitated Cu and SmCo_(5-x)T_x phase rich in Cu disperse on the cell-wall. They probably play, in the course of magnetization reversal, the role of pinning the domain wall, hence, giving high coercivity. 收稿日期: 1983-05-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 蒋景凯 肖连芳 王家海 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1983/V19/I5/65 1 Livingston, J.P.; Martin, D.L., J. Appl. Phys., 48 (1977) , 1350． 2 Nagel, H.; Menth, A., IEEE Trans. Math., MAG-12 (1976) , 1961． 3 Sun Daku; Liu Yujin, Proc. 5th Int. Workshop on Rare Earth-Cobalt Permanent Magnets and Their Application, Roanoke, Virginia. (USA), June, 1981, p. 525． 4 Yoneyama, T.; Fukuno, A.; Ojima, T., Proc. 4th Int. Workshop on Rare Earth-Cobalt Permanent Magnets and Their Application, Hakome National Park, Jpn., May, 1979, p.407． 5 Shimoda, T.; Okonogi, I; Teraishi, K., Proc, 5th Int. Workshop on Rare Earth-Cobalt Permanent Magnets and Their Application, Roanoke, Virginia(USA), June, 1981, p.595． 6 Mishra, R. K.; Thomas, G., Proc. 4th Int. Workshop on Rare Earth-Cobalt Permanent Magnets and Their Application, Hakone National Park, Jpn., May. 1979, p.301． 7 杨应昌;何文旺;林勤,待发表. 8 金子秀夫,日本金属学会会报,2 (1976) ,109． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed