Influence of the grain size on the magnetic and magnetomechanical properties of high-purity iron

Degauque, J.; Astie, B.; Porteseil, J.L.; Vergne, Romain

doi:10.1016/0304-8853(82)90166-4

Cited by 90 publications

(22 citation statements)

References 6 publications

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“…For small grain sizes, with ' o50 mm, our slope data agrees within 20% of previous results by Degauque et al [6]. For larger grain sizes, both Degaque et al [6] and Yensen [1] have obtained a much greater slope. Variations in chemical composition also affect the slope of such relation.…”

Section: Comparison With Literaturesupporting

confidence: 92%

“…Degauque et al [6] measured the H c of iron samples coldworked to different extents, but annealed at the same temperature. He offered a confirmation of Yensen's [1] data with approximately the same slope, for the materials were very similar.…”

Section: Introductionmentioning

confidence: 99%

“…H c Â 1/' at B max ¼1.0 T; linear fits based on the works of Yensen[1] and Degauque et al[6] have been added for comparison.…”

mentioning

confidence: 99%

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Determining the effect of grain size and maximum induction upon coercive field of electrical steels

Landgraf

Silveira

Rodrigues-Jr.

2011

Journal of Magnetism and Magnetic Materials

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a b s t r a c tAlthough theoretical models have already been proposed, experimental data is still lacking to quantify the influence of grain size upon coercivity of electrical steels. Some authors consider a linear inverse proportionality, while others suggest a square root inverse proportionality. Results also differ with regard to the slope of the reciprocal of grain size-coercive field relation for a given material. This paper discusses two aspects of the problem: the maximum induction used for determining coercive force and the possible effect of lurking variables such as the grain size distribution breadth and crystallographic texture. Electrical steel sheets containing 0.7% Si, 0.3% Al and 24 ppm C were cold-rolled and annealed in order to produce different grain sizes (ranging from 20 to 150 mm). Coercive field was measured along the rolling direction and found to depend linearly on reciprocal of grain size with a slope of approximately 0.9 (A/m)mm at 1.0 T induction. A general relation for coercive field as a function of grain size and maximum induction was established, yielding an average absolute error below 4%. Through measurement of B 50 and image analysis of micrographs, the effects of crystallographic texture and grain size distribution breadth were qualitatively discussed.

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Section: Comparison With Literaturesupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Determining the effect of grain size and maximum induction upon coercive field of electrical steels

Landgraf

Silveira

Rodrigues-Jr.

2011

Journal of Magnetism and Magnetic Materials

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“…Fe 69 Ni 9 CO 2 powders of 10e15 nm grain sizes show almost no hysteresis, being indicative of superparamagnetic characteristics [655]. However, when the particles get closer together, the superparamagnetic behavior vanishes and the coercivity is present [654,656]. The coercivity increases with the inverse of grain size, which follows a H C w 1/K j relation [626,654,657].…”

Section: Discussionmentioning

confidence: 96%

Size dependence of nanostructures: Impact of bond order deficiency

Sun

2007

Progress in Solid State Chemistry

808

717

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“…Fe 69 Ni 9 CO 2 powders of 10-15 nm grain sizes show almost no hysteresis, being indicative of superparamagnetic characteristics [39]. However, when the particles get closer together, the superparamagnetic behavior vanishes and the coercivity is present [38,40]. The coercivity increases with the inverse of grain size, which follows a H C -1/K relation [5,38,41].…”

Section: Coercive Performancementioning

confidence: 88%