The Analysis of Resistance to Brittle Cracking of Tungsten Doped TiB2 Coatings Obtained by Magnetron Sputtering

Coatings

Jerzy Smolik¹  Joanna Kacprzyńska-Gołacka¹  Artur Piasek¹  Sylwia Sowa¹ 

[1] Łukasiewicz Research Networks–Institute for Sustainable Technology, 6/10 Pułaskiego St., 26-600 Radom, Poland;

关键词: PVD coatings;    nanoindentation;    brittle cracking;    fracture toughness;   

DOI  :  10.3390/coatings10090807

来源: DOAJ

【 摘 要 】

In this work, the authors present the possibility of characterization of the fracture toughness in mode I (K_IC) for TiB₂ and TiB₂ coatings doped with different concentration of W (3%, 6% and 10%). The Young’s modulus, hardness and fracture toughness of this coatings are extracted from nanoindentation experiments. The fracture toughness was evaluated using calculation of crack length measurement. An important observation is that increasing tungsten concentration in the range 0–10% changes the microstructure of the investigated coatings: from columnar structure for TiB₂ coating to nano-composite structure for Ti-B-W (10%) coating. It can be concluded that doping with concentration 10 at.% W causes an increase of the fracture toughness for the tested coatings.

【 授权许可】

Unknown