Effect of ageing time on microstructure and mechanical properties of SAF 2205 duplex stainless steel

• Autorzy: Penha R. N. , Silva L. B. , Mendonça C. S. P. , Moreira T. C. , Melo M .L. N. M.

Identyfikatory

DOI

10.5604/01.3001.0012.1381

• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this study was to present the influence of mass concentration of the reinforcement phase on the structure and optical properties of the obtained composite thin films with a polymer matrix reinforced by SiO2, TiO2 and Bi2O3 nanoparticles, produced by the spin-coating method. Design/methodology/approach: To produce composite materials, 10% wt. polymer solutions of polyacrylonitrile (PAN) and N, N - Dimethyloformamide (DMF) were used, containing nanoparticles with a mass concentration ratio of, sequentially: 0, 4, 8, 12%. The morphology, structure and chemical composition of the obtained thin films were determined on the basis of surface topography images, taken using atomic force microscopy (AFM) and a scanning electron microscope (SEM) with EDX and QBSD spectrometers. In order to analyse the optical properties, UV-Visible spectroscopy (UV-Vis) was used. The width of the band gap was determined on the basis of the absorption spectra of radiation (UV-Vis). Findings: The carried out morphology and surface structure research showed that with increasing mass increased porosity of the produced coating surface was observed. In addition, the greater the diameter of the applied ceramic nanoparticles, the more noticeable this effect was. The analysis of the optical properties of the obtained nanomaterials, carried out based on the registered spectra in absorption function of the wavelength, revealed a strong absorption of this type of layers under ultraviolet radiation. Research limitations/implications: The nanostructured materials as components provides nanocomposite optical properties, such as absorption and width of the energy gap. In addition, nanoparticle content causes changes of the surface morphology, which is an important parameter of thin films in potential applications. Originality/value: The properties of films depend not only on the individual components used, but also on the morphology and the interfacial characteristics.

Słowa kluczowe

EN

sigma phase; aging; duplex stainless steel

PL

faza sigma; starzenie się; stal nierdzewna duplex

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2018
• Tom: Vol. 91, nr 1
• Strony: 23--30
• Opis fizyczny: Bibliogr. 19 poz.

Twórcy

autor

Penha R. N.

• Instituto de Engenharia Mecanica, Universidade Federal de Itajuba, Av. BPS, 1303, Pinheirinho, Itajuba - MG, 37.500-903, Brazil

autor

Silva L. B.

• Instituto de Engenharia Mecanica, Universidade Federal de Itajuba, Av. BPS, 1303, Pinheirinho, Itajuba - MG, 37.500-903, Brazil

autor

Mendonça C. S. P.

• Instituto de Engenharia Mecanica, Universidade Federal de Itajuba, Av. BPS, 1303, Pinheirinho, Itajuba - MG, 37.500-903, Brazil

autor

Moreira T. C.

• Instituto de Engenharia Mecanica, Universidade Federal de Itajuba, Av. BPS, 1303, Pinheirinho, Itajuba - MG, 37.500-903, Brazil

autor

Melo M .L. N. M.

• Instituto de Engenharia Mecanica, Universidade Federal de Itajuba, Av. BPS, 1303, Pinheirinho, Itajuba - MG, 37.500-903, Brazil

Bibliografia

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