Effect of the particle size of starting powders on the results of spectral analysis of sintered materials
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The relative intensity of the spectral lines of an addition and, consequently, the addition content determined by spectral analysis with a high-frequency spark generator depend on the ratio of the particle sizes of the addition and alloy matrix powders. To determine the true composition of a sintered material, it is necessary to employ powder-metallurgically produced reference standards of the same porosity and from powders of the same fractions as the alloy to be analyzed.
The particle size of the starting powder has no effect on the results of spectral analysis with a high-frequency spark generator, provided that the particle sizes of the matrix and addition powders used for the preparation of the sintered material are the same. In such a case, the true concentration of an addition in a material with a porosity of less than 20% may be determined using cast reference standards of the same class as the alloy to be analyzed.
In operation with a condensed high-frequency spark generator, the addition concentration determined by spectral analysis is almost independent of the ratio of the addition and matrix particle sizes (analytical error of 5–7 rel.%). When such an analytical error linked with the effect of particle size is permissible, analysis of sintered materials may be performed with the aid of cast reference standards of the same composition and structure.
KeywordsParticle Size Porosity Spectral Analysis Relative Intensity Spectral Line
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- 1.A. S. Dem'yanchuk, Physical Optics and Spectroscopy [in Russian], Kiev (1965).Google Scholar
- 2.A. S. Dem'yanchuk, Ukr. Fiz. Zh.,6, No. 6 (1961).Google Scholar
- 3.O. I. Fushchich and A. S. Dem'yanchuk, Poroshkovaya Met., No. 4, 61 (1967).Google Scholar
- 4.A. S. Dem'yanchuk and O. I. Fushchich, Zh. Prikl. Spektroskopii,10, 550 (1969).Google Scholar
- 5.O. I. Fushchich and A. S. Dem'yanchuk, Poroshkovaya Met., No. 9 (1970).Google Scholar