Microstructure and properties of nanocomposite Ti–B–N and Ti–B–C coatings

Mitterer, Christian; Mayrhofer, P.H.; Beschliesser, M.; Losbichler, P.; Warbichler, Peter; Hofer, Ferdinand; Gibson, P.N.; Gissler, W.; Hruby, Hynek; Musil, J.; Vlček, Jaroslav

doi:10.1016/s0257-8972(99)00489-2

Cited by 178 publications

(61 citation statements)

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“…The hardness of the coatings is lower than for TiC [25], and also lower than in earlier 284 reports on the hardness of Ti-B-C coatings [41,42], and it did not increase with the 285 incorporation of B, which was reported before [1,2,3,4]. This is probably an affect off a 286 larger fraction of soft amorphous matrix in these coatings compared with [41,42].…”

mentioning

confidence: 68%

“…Also, the typical XTEM overview image of the coatings (see Figure 216 3a), shows a columnar structure, from the extended growth of TiC as has been indicative 217 for TiC/C nanocomposite growth [15,25]. In contrast, B-rich Ti-B-C coatings have a 218 more homogenous if not featureless structure as TiB 2 tends to form in the coatings [1,11]. 219 220 Worth mentioning is also that with increased Ti and B content, B bonds to C, and the BC x 221 concentration increases in the amorphous matrix since the concentration of free C 222 decreases.…”

mentioning

confidence: 92%

“…Ti-B-C-based composite coatings have been studied for tribological applications [1,2,3,4], 23 in which B increases the hardness and the wear resistance of TiC. The Ti-B-C ternary 24 phase diagram contains TiC, TiB 2 , and C. Thus, the selection of composition in the 25 composite can give a trade-off between the lubricating amorphous C and probable BC x 26 phase [5] for good mechanical properties [1,2,3,4] and the hard, but also the conductive 27…”

mentioning

confidence: 99%

“…The Ti-B-C ternary 24 phase diagram contains TiC, TiB 2 , and C. Thus, the selection of composition in the 25 composite can give a trade-off between the lubricating amorphous C and probable BC x 26 phase [5] for good mechanical properties [1,2,3,4] and the hard, but also the conductive 27…”

mentioning

confidence: 99%

“…Earlier work on Ti-B-C sputtered 28 coatings has suggested that B can be incorporated into TiC [6] or that nc-TiC is 29 embedded in a quasi-amorphous TiB 2 phase [1,2] at low B content. For high B contents, 30 C may be incorporated into TiB 2 [6,9,10] or nc-TiB 2 may be embedded in a quasi-31 amorphous TiC phase [1,2]. Similar to the Ti-B-N system [ 11 ] an equiaxed 32 nanocrystalline structure can be expected for Ti-B-C coatings due to a segregation-driven 33 renucleation process, and that the coatings contain TiC (TiN) and TiB 2 as the 34 thermodynamically favorable phases.…”

mentioning

confidence: 99%

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Ti–B–C nanocomposite coatings deposited by magnetron sputtering

Lauridsen

Nedfors

Jansson

et al. 2012

Applied Surface Science

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9Ti-B-C nanocomposite coatings with a B content of 8-17 at. %, have been deposited by 10 magnetron sputtering from B 4 C, Ti, and C targets. X-ray diffraction, photoelectron 11 spectroscopy, and electron microscopy show that the coatings consist of nanocrystalline 12 (nc) TiC:B embedded in a matrix of amorphous (a) C, BC x ,TiO x and BO x . The fraction of 13 amorphous phase scales with the Ti concentration, where the matrix predominantly 14 consists of free C with some BC x in coatings with a C/Ti ratio >1, while the matrix 15 predominantly consists of BC x with some free C in coatings with a C/Ti ratio <1. Nc-16TiC:B/a-BC x /a-C coatings with low amount of free C exhibit a contact resistance 17 comparable to the contact resistance of an Ag sputtered coating at loads of ~1 N against 18 an Au probe, despite the O content of ~16 at. %.

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