Die Bedeutung der magnetischen Kenngrößen für die Beurteilung von Hartmetall‐Legierungen

Franssen, H.

doi:10.1002/srin.194805740

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1965

2013

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“…For many years the ferromagnetic properties of sintered compacts of WC-CO have been used by the manufacturers of these materials as a method of quick, nondestructive testing for the purpose of quality control (Franssen 1948), despite the fact that the mechanisms responsible for the hysteresis are hardly understood at all. For such inhomogeneous systems in which only the minority phase is ferromagnetic, it is to be expected that the coercivity is strongly structure dependent.…”

Section: Introductionmentioning

confidence: 99%

Precipitation and magnetic hardening in sintered WC-Co composite materials

Tillwick¹,

Joffe²

1973

J. Phys. D: Appl. Phys.

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Measurements of the thermomagnetic properties of sintered WC-Co composites are described. By means of suitable heat treatment, changes in the saturation magnetization and coercivity are produced in WC-25 wt% Co materials. These changes are reversible to a large extent, and the observations indicate the formation of Co3W on ageing at 700 °C after having previously homogenized at 1000 °C. The observed behaviour is consistent with the formation of small intra-granular precipitate particles in the Co phase. Observations for WC-3 wt% Co showed different solubilities for W in Co in high- and low-cobalt materials.

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Section: Introductionmentioning

confidence: 99%