Characterizations and Kinetics of Refractory Niobium Carbide Coatings on AISI D3 Steel

Günen A., Açıkgöz H. H., Keddam M., KARAHAN İ. H.

Journal of Materials Engineering and Performance, vol.32, no.19, pp.8972-8980, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 19
  • Publication Date: 2023
  • Doi Number: 10.1007/s11665-022-07768-3
  • Journal Name: Journal of Materials Engineering and Performance
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Chemical Abstracts Core, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.8972-8980
  • Keywords: characterization, integral diffusion model, niobium carbide coating, thermo-reactive diffusion
  • Hatay Mustafa Kemal University Affiliated: Yes

Abstract

Niobium carbide (NbC) coatings were carried out by means of the thermo-reactive diffusion (TRD) on AISI D3 cold work tool steel, in the powder mixture composed of 25 wt.% ferro-niobium, 70 wt.% alumina and 7.5 wt.% ammonium chloride at 1173, 1273 and 1373 K for 2, 4 and 6 h. NbC coatings were inspected with scanning electron microscopy, x-ray diffractometer, Vickers micro-hardness testing. Homogeneous, crack-free and uniform NbC coatings with 8.75-17.10 µm thickness and 1586-2263 HV0.025 hardness were obtained on AISI D3 steel by TRD process. The integral method-based model was used for studying the carbon diffusion by forming NbC coatings. The value of 45.93 kJ mol−1 was determined as the necessary activation energy required for the niobizing process of AISI D3 steel.