Metal-bonded Co-ferrite composites for magnetostrictive torque sensor applications

被引:121
作者
Chen, Y [1 ]
Snyder, JE [1 ]
Schwichtenberg, CR [1 ]
Dennis, KW [1 ]
McCallum, RW [1 ]
Jiles, DC [1 ]
机构
[1] Iowa State Univ, Ames Lab, Ames, IA 50011 USA
关键词
ferrite; torque sensor; magnetostriction; magnetomechanical effect;
D O I
10.1109/20.800620
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A new class of magnetomechanical sensor materials, Co-ferrite (CoO . Fe2O3) and metal-bonded (Ag, Ni, Co) Co-ferrite composites, has been investigated. These materials exhibited magnetostriction in excess of 200 ppm and high d(33) (partial derivative lambda/partial derivative H)(sigma) coefficient, 1.3X10(-9) A(-1)m, at low applied field (<100kA/m). Selected compositions were formed into test samples in the form of rings brazed to stainless steel through-shafts. Changes of surface axial magnetic field in response to applied torque as high as 64 AN(-1)m(-2) were observed for a demonstration sample of dimensions 25 mm OD, 12.5 mm ID, and 8 mm high, A hysteresis of +/- 0.5 N.m was observed. These materials appear to be promising candidates for torque sensors, and other magnetostrictive sensor and actuator applications.
引用
收藏
页码:3652 / 3654
页数:3
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