Evaluation of fracture toughness of ZrN hard coatings by internal energy induced cracking method

Mechanical properties and toughening mechanism of TiB2/NiTi reinforced titanium matrix composite coating by laser cladding

“…Vickers indentations were prepared on the cross section of the coating with a load of 30 kg and dwell time of 15 s using a HBRV-187.5 Vickers-hardness, and morphologies of indentations were observed using S-3400 scanning electron microscope equipped (SEM). Base on fracture mechanics theories of indentation, the driving force for crack propagation was caused by the load pressure, so fracture toughness of the coatings was evaluated by observing the length of the indentation crack which acted as an indirect evaluation [31][32][33][34]. To ensure the reliability of the results, the standard sample was used for the calibration before testing, and fracture toughness of the coating was evaluated by using multiple measurements way to accomplish.…”

Influence of Niobium and Hafnium Doping on the Wear and Corrosion Resistance of Coatings Based on Zrn

“…The concentration of vacancies and other structural defects in the ZrN coating material decreases with increasing deposition temperature [20]. ZrN coatings also exhibit high crack resistance and brittle fracture resistance [22][23][24][25][26][27]. The crack resistance and fracture strength of the coating can be associated with the accumulation and relaxation of residual stresses during deposition [23].…”

“…ZrN coatings also exhibit high crack resistance and brittle fracture resistance [22][23][24][25][26][27]. The crack resistance and fracture strength of the coating can be associated with the accumulation and relaxation of residual stresses during deposition [23]. The high heat resistance of the coating manifests in the preservation of the structure parameters during long-term holding at a temperature of 1000 • C [28].…”

Development of Multicomponent Nanostructured Nitride Coatings to Protect against Corrosion Products from Titanium Alloy

“…This coating makes it possible to simultaneously increase wear and corrosion resistance [5,6]. At the same time, ZrN has sufficient plasticity to effectively resist cracking and brittle fracture [7,8], and it has high heat resistance [9]. ZrN coatings are actively used to increase the wear and corrosion resistance of products made from materials such as stainless steel [10,11], magnesiumbased alloys [12] and titanium alloys [13][14][15].…”