Optimization of the surface mechanical strength of AISI 316L physically vapour deposited nitrogen-doped coatings on AISI 316L substrates

On the nature, properties and wear response of s-phase (nitrogen-alloyed stainless steel) coatings on AISI 316L

“…Also listed in Table 4 are values for the lattice parameter of binary Fe-N austenites [12]. The value of a 0 determined in the present work is similar to the value of 0.3587 reported by other authors [24][25][26] and is somewhat lower than the lattice parameter of 0.35956 nm calculated for the uncoated (bulk) 316L substrate (Table 3). This effect is probably due to the compressive residual stress present in the sputterdeposited coatings.…”

“…The value obtained for m N in the present investigation lies between the values for strained and stress-free bulk Fe-N austenites but is considerably lower than that reported elsewhere for AISI 316L-nitrogen coatings [26]. These variations may arise due to differences in coating stress and deposition techniques as well as differences in target material.…”

“…For [N] between 8.6 and 40 N/100 Me, a increased linearly with increasing [N] according to the general relationship a a 0 m N N where a 0 0.3585 nm and m N 0.00075 nm/(N/100 Me). These constants are compared in Table 4 with those obtained by other authors [24][25][26] for stainless steelnitrogen coatings. Also listed in Table 4 are values for the lattice parameter of binary Fe-N austenites [12].…”

Formation of an MN-type cubic nitride phase in reactively sputtered stainless steel-nitrogen films

“…It is also noted from Fig. 1 that the XRD peaks from the g N phase films are broad, probably arising from the large lattice strain induced due to the supersaturation of nitrogen in the fcc lattice [8][9][10].…”

“…Several deposition techniques have been used to fabricate such BCC films, including ion beam sputtering [1][2][3], magnetron sputtering [4], arc discharge [5] and thermal evaporation [6]. More recently, it has been shown that the austenitic fcc structure can be stabilized in the stainless steel films by the incorporation of nitrogen through reactive sputtering in nitrogen and argon gas mixtures [7][8][9]. The resultant austenite-like films contain up to 40 at% nitrogen dissolved in the fcc lattice as solid solution.…”