Improved adhesion of TiN coatings on Al <sub>2</sub> O <sub>3</sub> –carbide composites by DFT calculations and experimental arc‐PVD synthesis
نویسندگان
چکیده
Electronic and atomic structures of interfaces between TiN coatings Al2O3–WC composites were investigated by Density functional theory (DFT) calculations. As typical examples, interfacial orientation relationships TiN(001)/Al2O3(0001), TiN(001)/WC(0001), TiN(111)/Al2O3(0001), TiN(111)/WC(0001) chosen. It was found that the TiN(111)/Al2O3(0001) have structural units six-fold coordinated triangular prisms centered on Ti atoms. In contrast, those with TiN(001) tend to more distorted structure due their larger lattice misfits. Theoretical works separation showed strength is much increased at TiN(111) interfaces, as compared interfaces. Accordingly, experimental controls TiN-coating orientations attempted using cathodic arc ion plating method. (111) in can be enhanced then mechanical strengths hardnesses increase rising bias voltages.
منابع مشابه
Combustion Synthesis of Titanium-Tungsten Carbide Composites in Iron Matrix
Combustion synthesis has been used to produce Fe-(Ti,W)C composites. A simple reactor was designed which made it possible to ignite the samples under controlled atmosphere. Samples with different W/Ti ratio were ingnited under argon atmosphere by an electric arc and a self-propagating reaction was initiated in each sample. Different composites such as WC in Fe-Ti matrix, WC+(Ti,W)C in Fe matrix...
متن کاملSynthesis and DFT calculations of spirooxaphosphirane complexes.
In situ formed Li/Cl phosphinidenoid complexes [Li(12-crown-4)][M(CO)5(ClPC5Me5)] 3a-c (M = Cr, Mo, W) reacted with cyclobutanone (4), cyclopentanone (5) and cyclohexanone (6) in Et2O to yield the first P-C5Me5 substituted C(3)-spirofused oxaphosphirane complexes 7a-c, 8a and 9a,a'. In the case of cyclopentanone and 1a the outcome of the reaction in THF was different: here the formation of 8a a...
متن کاملCombustion Synthesis of Titanium-Tungsten Carbide Composites in Iron Matrix
Combustion synthesis has been used to produce Fe-(Ti,W)C composites. A simple reactor was designed which made it possible to ignite the samples under controlled atmosphere. Samples with different W/Ti ratio were ingnited under argon atmosphere by an electric arc and a self-propagating reaction was initiated in each sample. Different composites such as WC in Fe-Ti matrix, WC+(Ti,W)C in Fe matrix...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the American Ceramic Society
سال: 2022
ISSN: ['0002-7820', '1551-2916']
DOI: https://doi.org/10.1111/jace.18434