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Testing of flame sprayed Al2O3 matrix coatings containing TiO2

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Języki publikacji
EN
Abstrakty
EN
The paper presents the results of the properties of flame sprayed ceramic coatings using oxide ceramic materials coating of a powdered aluininiuni oxide (Al2O3) matrix with 3% titanium oxide (TiO2) applied to unalloyed S235JR grade structural steel. A primer consisting of a metallic Ni-Al-Mo based powder has been applied to plates with dimensions of 5X200X300 mm and front surfaces of ø40x50 mm cylinders. Flame spraying of primer coating was made using a RotoTec 80 torch, and an external coating was made with a CastoDyn DS 8000 torch. Evaluation of the coating properties was conducted using metallographic testing, phase composition research, measurement of microhardness, substrate coating adhesion (acc. to EN 582:1996 standard), erosion wear resistance (acc. to ASTM G76-95 standard), and abrasive wear resistance (acc. to ASTM G65 standard) and thermal impact. The testing performed has demonstrated that flame spraying with 97% Al2O3 powder containing 3% TiO2 performed in a range of parameters allows for obtaining high-quality ceramic coatings with thickness up to ca. 500 μni on a steel base. Spray coating possesses a structure consisting mainly of aluminium oxide and a small amount of NiAl10O16 and NiAl32O49 phases. The bonding primer coat sprayed with the Ni-Al-Mo powder to the steel substrate and external coating sprayed with the 97%Al2O3 powder with 3% TiO2 addition demonstrates mechanical bonding characteristics. The coating is characterized by a high adhesion to the base amounting to 6.5 MPa. Average hardness of the external coating is ca. 780 HV. The obtained coatings are characterized by high erosion and abrasive wear resistance and the resistance to effects of cyclic thermal shock.
Twórcy
  • Silesian University of Technology, Faculty of Mechanical Engineering, The Chair of Welding, 18A Konarskiego str., 44-100 Gliwice, Poland
autor
  • Silesian University of Technology, Faculty of Mechanical Engineering, The Chair of Welding, 18A Konarskiego str., 44-100 Gliwice, Poland
autor
  • Silesian University of Technology, Faculty of Mechanical Engineering, Institute of Engineering Materials and Bio Materials,18A Konarskiego str., 44-100 Gliwice, Poland
autor
  • Silesian University of Technology, Faculty of Mechanical Engineering, Institute of Engineering Materials and Bio Materials,18A Konarskiego str., 44-100 Gliwice, Poland
Bibliografia
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Uwagi
EN
This work was supported by the Faculty of Mechanical Engineering of the Silesian University of Technology in 2015 as the subsidy for statutory activity
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-551ee4d9-788e-4c9c-bc31-f598b1cef201
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