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Title: The structural-phase state of iron-carbon coatings formed by the ultradispersed particles

The methods of nuclear gamma-resonance spectroscopy, elemental microanalysis, and X-ray diffraction were used to study nanoscale coatings. The samples were prepared by magnetron sputtering of carbon and iron particles. They alternately were deposited on monocrystalline silicon or polycrystalline corundum substrate moving relative to the plasma flows in the form of sublayers with a thickness of less than 0.6 nm up to the total thickness of 150-500 nm. Solid solutions with the carbon concentrations of up to 7.5, 12.0, 17.6, and 23.9 at% were produced by co-precipitation of ultradispersed particles of iron and carbon. Using method of conversion electron Mössbauer spectroscopy, we detected the anisotropy of orientation of magnetic moments of iron atoms due to texturing of the formed coatings. The deviation of the crystallite orientation from the average value depends on the degree of carbonization. At 550°C, the pearlite eutectic α‐Fe(C)+Fe{sub 3}C is formed from the amorphous structure without formation of intermediate carbides. The relative content of cementite correlates with the amount of carbon in the coating. The formation of the solid solutions-alloys directly during the deposition process confirms the theory of thermal-fluctuation melting of small particles.
Authors:
; ; ; ; ;  [1]
  1. Institute of Nuclear Physics, 050032 Almaty (Kazakhstan)
Publication Date:
OSTI Identifier:
22308103
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1622; Journal Issue: 1; Conference: Conference on Moessbauer spectroscopy in materials science 2014, Hlohovec u Breclavi (Czech Republic), 26-30 May 2014; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CARBONIZATION; CEMENTITE; COATINGS; CONCENTRATION RATIO; COPRECIPITATION; DEPOSITION; GAMMA SPECTROSCOPY; IRON; MAGNETIC MOMENTS; MELTING; MICROANALYSIS; MOESSBAUER EFFECT; NANOSTRUCTURES; PARTICLES; POLYCRYSTALS; SOLID SOLUTIONS; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION