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Graphite nodule and cell count in cast iron

100%

Fraś E. , Górny M. , Lopez H. F.

Archives of Foundry Engineering

2007

tom Vol. 7, iss. 3

47-52

In this work, a model is proposed for heterogeneous nucleation on substrates whose size distribution can be described by the Weibull statistics. It is found that the nuclei density, N_[nuc�] can be given in terms of the maximum undercooling, [...]. When nucleation occurs on all the possible substrates, the graphite nodule density, N_V,n or eutectic cell density N_V after solidification equals N_s. In this work, measurements of N_V,n and N_V values were carried out on experimental nodular and flake graphite iron castings processed under various inoculation conditions. The volumetric nodule N_V,n or graphite eutectic cell N_V count, were estimated from the area nodule count, N_A,n or eutectic cell count N_A on polished cast iron surface sections by stereological means. In addition, maximum undercoolings [...]

Zastosowanie spektroskopii Ramana w badaniu minerałów pozaziemskich wybranych meteorytów

100%

Szurgot M. , Kozanecki M. , Karczemska A. , Mitura S.

Acta Societatis Metheoriticae Polonorum

2009

tom 1

156-160

Ordinary chondrites DaG 610 and NWA 869, as well as graphite nodules from Canyon Diablo iron meteorites were investigated by confocal Raman microspectroscopy in order to identify extraterrestrial minerals. Olivines, orthopyroxenes (enstatite, bronzite and hyperstene), clinopyroxenes (pigeonite), plagioclase, troilite and various carbon phases, mainly graphite and diamond have been identified and characterized.