EFFECTS OF ELECTRON-BEAM AND GAMMA-RAY IRRADIATION ON THE MAGNETIC-FLUX OF ND-FE-B AND SM-CO PERMANENT-MAGNETS

被引：49

作者：

OKUDA, S ^{[1
]}

OHASHI, K ^{[1
]}

KOBAYASHI, N ^{[1
]}

机构：

[1] SHIN ETSU CHEM CORP,FUKUI 915,JAPAN

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1994年 / 94卷 / 03期

关键词：

D O I：

10.1016/0168-583X(94)95358-9

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The effects of irradiation with 17 MeV electron beams and Co-60 gamma-rays on the magnetic flux of Nd-Fe-B and Sm-Co permanent magnets have been studied. At an electron dose of 2.1 X 10(-3) C/cm(2) (at an absorbed dose of 2.6 MGy), the magnetic flux loss of Nd-Fe-B is 9%, while the flux loss of Sm-Co is below 0.4% at a dose of 1.4 x 10(-3) C/cm(2). After remagnetization of the irradiated Nd-Fe-B sample the magnetic flux almost recovers to the strength before irradiation. For gamma-ray irradiation of Nd-Fe-B and Sm-Co at an absorbed dose of 2.8 MGy, the flux loss is below 0.5%. Irradiation by gamma-rays is considered to be equivalent to that of electrons at energies below 0.8 MeV. The difference between the results for electron-beam and gamma-ray irradiation of Nd-Fe-B is discussed.

引用

页码：227 / 230

页数：4

共 8 条

[1] RADIATION EFFECTS OF PROTONS ON SAMARIUM-COBALT PERMANENT-MAGNETS [J].