Mechanical and tribological properties of duplex treated TiN, nc-TiN/a-SiNx and nc-TiCN/a-SiCN coatings deposited on 410 low alloy stainless steel

Processing of an ultrafine-grained titanium by high-pressure torsion: An evaluation of the wear properties with and without a TiN coating

“…As shown in Fig. 4, the first cracking of the TiN coating on CG Ti occurs at $2.5 N while for the TiN coating on UFG Ti a first crack appears at $5.5 N. In earlier scratch studies, a 2 mm TiN coating gave values for L c of $25 N and $16 N on hot working steel and stainless steel, respectively (Dobrzanski et al, 2005;Guruvenket et al, 2009) and a 2 mm TiN coating on a Ti substrate gave a value for L c of $36 N (Stallard et al, 2006). The values for L c of the TiN coating may vary between different studies because of differences in the interlayer and coating processes.…”

Nano-impact testing of TiFeN and TiFeMoN films for dynamic toughness evaluation

“…At lower impact load, the ratio of impact depth to film thickness is low so higher H 3 /E r 2 , in the film is beneficial by preventing cracks from forming in the first place. Increasing H 3 /E r 2 , has been associated with high resistance to cracking and hence high fracture toughness [13][14][15][16][17][18][19][20]. At higher impact load, effective durability and damage tolerance requires resistance to both formation and propagation of cracks under dynamic loading.…”

“…Guruvenket and co-workers have recently reported that surface nitriding of low alloy steel substrates prior to deposition of nc-TiN/a-SiN x and ncTiCN/a-SiCN films produced a more gradual change in hardness from substrate to film and reduced the interfacial stress resulting in excellent wear resistance when sliding against 6 mm alumina balls [20].…”

“…picture frame cracking of ZnO, there are no excursions on the load-displacement curves [8]. There are opposing views about how the indentation curve shape should look to correspond to a tougher material, when discontinuities (abrupt depth jumps) due to cracking are not present, and parameters such as the ratio of hardness to modulus (H/E, a measure of the partitioning between energy dissipation by elastic and plastic deformation in the indentation contact) [9][10], plasticity index (plastic work done/total work done) [11][12] and the resistance to plastic deformation (H 3 /E 2 ) [13][14][15][16][17][18][19][20] have been investigated as these can be easily obtained in a nanoindentation test. The shape of the indentation curve itself can be considered as a "fingerprint" for a material as it is directly related to the H/E r ratio in the contact, where E r is the reduced indentation modulus as defined in Equation 1 (see 3 section 2).…”

Progress in Tribological Properties of Nano-Composite Hard Coatings under Water Lubrication

“…As shown in Table 6, TiCN coatings presented a better tribological performance than TiN coatings in air [62][63][64][65]. More importantly, the friction coefficient and wear rate of the TiCN/SiC tribopair in water were lower than those in air because of different chemical reactions in different environments [66].…”