High temperature behavior of functional TiAlBSiN nanocomposite coatings

Abstract

This article reports on the thorough characterization of structural-phase transformation in amorphous TiAlBSiN coating after high temperature annealing at 900°C in ambient air. The influence of annealing on the tribomechanical behavior of the coating at nano and micro scale was also examined. The research included multiple experimental techniques, i.e. AFM, SEM, TEM, HR-TEM, EDS, XPS and Raman spectroscopy. Experiments showed that the amorphous phase of the TiAlBSiN coating undergoes a structural transformation, evidenced in the changes of parameters such as topological and chemical short-range order after the post-deposition annealing at 900°C in air. The observed structural transformation, leads to a phase separation with the formation of a three dimensional nc-TiAl 3 /a-SiBN(O) nanocomposite structure. The relative increase of hardness, reduced elastic modulus, H/Er ratio and H 2 /E 3 r ratio after high temperature treatment of TiAlBSiN coatings is also reported. The complex interdependency between chemistry, morphology and relative composition of the amorphous TiAlBSiN coating phase, during the high temperature treatment, with the respective change of the tribo-mechanical characteristics, are evidence of the improvement of the coating properties in response to the environmental conditions and high temperature. This work contributes particularly to the development and understanding of flexible nanocomposite protective coatings and their changes at high temperature of operation.

Improved Adhesion of TiAlSiN Nanocomposite Coatings on Cemented Carbide Substrate by Pre-Implantation

“…Another discovery equally claimed our attention in that there was no crystal diffraction peak corresponding to Si element. The reason for this phenomenon may be that Si can substitute Al/Ti at cation lattice sites of the B1-NaCl lattice when the concentration of Si is less than 5 at.%-6 at.% in TiSiN and TiAlSiN coatings, which was verified by other previous studies [18,19]. The XRD peak (200) of TiAlSiN coatings pre-implanted with N and O shifted slightly towards a higher angle, implying a decrease in the lattice parameter because of incorporation of other atoms whose radii were smaller than those of the existing atoms [20]; or possibly this shift may be attributed to lattice distortion caused by high energy particle (N + , O + , Ar + ) bombardment.…”

Ab Initio Prediction of Mechanical and Electronic Properties of Ultrahigh Temperature High‐Entropy Ceramics (Hf0.2Zr0.2Ta0.2M0.2Ti0.2)B2 (M = Nb, Mo, Cr)

“…Most previous researches of crystalline high‐entropy materials have been conducted for metal HEAs of simple face‐ and body‐centered cubic (FCC and BCC), as well as occasionally hexagonal close packing (HCP) lattice structures . In this exciting research area, the design strategy of high entropy has even been extended to hard wear‐resistance coating of carbides and nitride, furthermore entropy‐stabilized oxide (Mg 0.2 Co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 )O and its derivatives (Mg 0.2 Co 0.2 Ni 0.2 Cu 0.2 Zn 0.2 ) 1‐ x ‐ y Ga y A x O (where A = Li, Na, or K) are reported very recently, which are the first crystal high‐entropy ceramics so far . It can be expected that the high entropy ceramics would have superior combination of excellent properties of ceramics, such as low density, high strength at high temperatures, exceptional wear resistance and corrosion resistance, and specific physical properties (optical, electrical and magnetic), hence lead to more widespread applications in many technical areas, such as engine manufacturing, industrial processing engineering, especially the high‐temperature techniques applications .…”

Nanocomposite Coatings: Preparation, Characterization, Properties, and Applications

“…This method is used generally for producing of the I/I nanocomposite coating [41][42][43][44][45][92][93][94][95][96][97], which includes the inorganic matrices and inorganic nanoparticles. For these coatings, PVD method includes the following: laser ablation [98], thermal evaporation [99], ion beam deposition [100], ion implantation [101,102], laser-assisted deposition [103], and atom beam cosputtering technique.…”

“…For inorganic matrix, such as metal matrix or alloy matrix, these nanocomposite coatings could be prepared by various methods, including chemical vapor deposition (CVD) (see Figure 3), powder metallurgy, physical vapor deposition (PVD) [41][42][43][44][45], thermal plasma spray [46][47][48], sol-gel [49][50][51][52] (see Figure 1), epitaxial growth [53], cold spray [54][55][56][57][58][59][60][61] (see Figure 2), and electrodeposition [62][63][64][65][66][67]. Metal matrix composite coatings that dispersed a second phase [68,69] have attracted extensive attention owing to unique properties such as oxidation and corrosion resistance [69,70], wear resistance [71,72], and magnetic properties [72].…”