Induced Thermal Stresses in Core Shell Magnetic Particles

被引：4

作者：

Astefanoaei, Iordana ^{[1
]}

Dumitru, Ioan ^{[1
]}

Stancu, Alexandru ^{[1
]}

机构：

[1] Alexandru Ioan Cuza Univ, Dept Phys, Iasi 700506, Romania

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2011年 / 47卷 / 10期

关键词：

Core-shell particles; finite element method; magnetic materials; thermal stresses;

D O I：

10.1109/TMAG.2011.2144964

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：

In this paper, the induced thermal stresses that appear during the cooling process from the room temperature to a lower temperature for core shell magnetic particles are analyzed. Using a finite element method for solving the Fourier heat transport equation, the thermal stresses in the system were calculated taking into account of the temperature dependence of thermal conductivity, heat capacity and different thermal expansion coefficients of the two materials (iron core + alumina shell) in contact. The thermal stresses depend on the particle's radius and the thickness of the alumina shell, having negative values due to the thermal contraction. It was estimated the influence of shell thickness on thermal stresses and on the speed of reaching the mechanical and thermal equilibrium state.

引用

页码：3829 / 3832

页数：4

共 10 条

[1]

Bosley B. A., 1960, THEORY THERMAL STRES

[2]

Cho S. J., 2009, J APPL PHYS, V95, P7489

[3] THERMODYNAMIC PROPERTIES OF IRON AND SILICON [J].

DESAI, PD .

JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1986, 15 (03) :967-983

[4]

Ho C.Y., 1972, J. Phys. Chem. Ref. Data, V1, P279, DOI [10.1063/1.3253100, DOI 10.1063/1.3253100]

[5]

Landau L., 2007, PHYS THEORIQUE, V7

[6]

Lekhnitskii S.G., 1977, Theory of Elasticity of an Anisotropic Body, VSecond

[7] The thermal expansion of pure metals copper, gold, aluminum, nickel, and iron [J].

Nix, FC ;

MacNair, D .

PHYSICAL REVIEW, 1941, 60 (08) :597-605

[8] The measurement of internal strain in core-shell Ni3Si(Al)-SiOx nanoparticles [J].

Pigozzi, G. ;

Mukherji, D. ;

Gilles, R. ;

Jencus, P. ;

Siemers, C. .

NANOTECHNOLOGY, 2009, 20 (24)

[9]

Schneider P.J., 1955, CONDUCTION HEAT TRAN

[10] Transverse magnetic anisotropy of magnetoelastic origin induced in Co nanowires [J].

Silva, E. L. ;

Nunes, W. C. ;

Knobel, M. ;

Denardin, J. C. ;

Zanchet, D. ;

Pirota, K. ;

Navas, D. ;

Vazquez, M. .

PHYSICA B-CONDENSED MATTER, 2006, 384 (1-2) :22-24

← 1 →