Roebuck, B (2002) An interlaboratory exercise on the magnetic properties of various WC hardmetals. NPL Report. MATC(A)78

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Abstract

An interlaboratory comparison exercise has been conducted to investigate the reproducibility of coercivity and magnetic moment/saturation measurements on a range of WC based hardmetals.
The measurements were made at seven collaborating organisations, six of which were industrial companies, and analysed at NPL. Seven materials were evaluated with a range of WC grain sizes from 0.3-3 µm and cobalt contents from 3-15 wt%.
It was found that the standard deviation of the magnetic coercivity value was dependent on the WC grain size, with higher uncertainty associated with the higher values of coercivity (smaller grain size). In contrast there was no clear dependence of the uncertainty in magnetic moment on structure, except for the materials with the very lowest values and they had a larger standard deviation.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	MATC(A)78
Keywords:	coercivity, hardness, magnetic moment
Subjects:	Advanced Materials Advanced Materials > Powder Route Materials Advanced Materials > Magnetic Measurements
Last Modified:	02 Feb 2018 13:17
URI:	http://eprintspublications.npl.co.uk/id/eprint/2386

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