We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Studies of the oxidation stability, mechanical characteristics of materials based on max phases of the Ti-Al-(C, N) systems, and of the possibility of their use as tool bonds and materials for polishing.
- Authors
Prikhna, T.; Starostina, A.; Lizkendorf, D.; Petrusha, I.; Ivakhnenko, S.; Borimskii, A.; Filatov, Yu.; Loshak, M.; Serga, M.; Tkach, V.; Turkevich, V.; Sverdun, V.; Klimenko, S.; Turkevich, D.; Dub, S.; Basyuk, T.; Karpets, M.; Moshchil, V.; Kozyrev, A.; Il'nitskaya, G.
- Abstract
Thermogravimetry and differential thermal analysis have been used to study the resistance to the air oxidation of high-density samples of TiAlC, TiAlC and TiAl(CN) solid solutions. It has been shown that the TiAlC samples are more stable than TiAlC and TiAl(CN) solid solutions and as the nitrogen content of the solid solution increases to x = 0.75, the oxidation resistance decreases. The following characteristics have been exhibited by the material containing 89 wt % TiAlC (the rest being AlO and TiC) having density 99% of theoretical: bending strength R = 500 MPa, compressive strength R = 700 MPa, fracture toughness K = 10.2 MPa·m, hardness HRA = 70 GPa, H = 4.6 GPa, Young modulus = 149.4 ± 28.7 GPa. After sintering with diamonds or cBN (50 wt %) at 5.5-7.7 GPa and 1350-1960°C for 0.07-1.0 h the TiAlC MAX phase decomposes to form TiC and TiAl or TiB and a thin layer of AlC forms at the interface with diamond. The AlC decomposition in a composite material due to the interaction with the air moisture results in the crack initiation along the diamond perimeter, which brings about the material fracture in 1-2 weeks. It has been found that the TiAlC powder is efficient for polishing natural and synthetic jewelry crystals and competitive in polishing efficiency and quality with ACM 2/1 grade diamond.
- Publication
Journal of Superhard Materials, 2014, Vol 36, Issue 1, p9
- ISSN
1063-4576
- Publication type
Article
- DOI
10.3103/S106345761401002X