The deformation of the substrate during indentation into superhard coatings: Bückle's rule revised

2015 ◽  
Vol 284 ◽  
pp. 206-214 ◽  
Author(s):  
Maritza G.J. Veprek-Heijman ◽  
Stan Veprek
Keyword(s):  
Superhard Coatings

scholarly journals Structure and properties of (Zr-Ti-Cr-Nb)N multielement superhard coatings

2015 ◽  
Vol 37 (2) ◽  
pp. 101-111 ◽  
Author(s):  
A. D. Pogrebnjak ◽  
B. A. Postol’nyi ◽  
Yu. A. Kravchenko ◽  
A. P. Shipilenko ◽  
O. V. Sobol’ ◽  
...  
Keyword(s):  
Structure And Properties ◽  
Superhard Coatings

Different approaches to superhard coatings and nanocomposites

2005 ◽  
Vol 476 (1) ◽  
pp. 1-29 ◽  
Author(s):  
Stan Veprek ◽  
Maritza G.J. Veprek-Heijman ◽  
Pavla Karvankova ◽  
Jan Prochazka
Keyword(s):  
Superhard Coatings

Possible Artefacts in Measurement of Hardness and Elastic Modulus on Superhard Coatings and the Verification of the Correctness of the Data

2002 ◽  
Vol 750 ◽  
Author(s):  
S. Veprek ◽  
S. Mukherjee ◽  
P. Karvankova ◽  
H.-D. Männling ◽  
J. L. He ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Young’S Modulus ◽  
Indentation Depth ◽  
Brillouin Scattering ◽  
Young's Modulus ◽  
Linear Extrapolation ◽  
Depth Sensing ◽  
Vibrating Reed ◽  
Superhard Coatings ◽  
Scanning Electron

ABSTRACTMeasurements of the hardness and Young's modulus of superhard coatings (HV≥40 GPa) by means of automated load-depth-sensing indentation technique can be subject to a number of errors that are discussed and exemplified here. Only load-independent values of hardness for loads larger than 30–50 mN can be considered reliable when the technique of Doerner and Nix (linear extrapolation of the unloading curve) is used to determine the corrected indentation depth. The results are compared with values of Vickers hardness calculated from the contact area of the remaining plastic deformation which was measured by means of calibrated scanning electron microscope. The values of Young's modulus obtained from the indentation are close to the zero-pressure shear modulus of the coatings as measured by means of Vibrating Reed and surface Brillouin scattering techniques.

Synthesis and Properties of Crystalline Carbon Nitride Composite Superhard Coatings

1995 ◽  
Vol 403 ◽  
Author(s):  
Yip-Wah Chung
Keyword(s):  
Smooth Surface ◽  
Carbon Nitride ◽  
Multilayer Coatings ◽  
Substrate Bias ◽  
Nitrogen Partial Pressure ◽  
Dc Magnetron Sputtering ◽  
Tin Coatings ◽  
Crystalline Films ◽  
Superhard Coatings ◽  
Sputtering System

AbstractMultilayer carbon nitride/TiN coatings were synthesized using a dual-cathode dc magnetron sputtering system. Fully crystalline films can be obtained when the thickness of the carbon nitride component is on the order of one nm. There appears to be a strong correlation between the occurrence of strong TiN(111) texture and the hardness of these multilayer coatings, as controlled by target powers, nitrogen partial pressure and substrate bias. These coatings can be synthesized at near room temperatures, with smooth surface morphology and hardness in the range of 45–55 GPa.

scholarly journals Формирование сверхтвердых покрытий в процессе обработки низкотемпературной плазмой азота в открытой атмосфере пленок титана

2021 ◽  
Vol 47 (9) ◽  
pp. 44
Author(s):  
М.Х. Гаджиев ◽  
Р.М. Эмиров ◽  
А.Э. Муслимов ◽  
М.Г. Исмаилов ◽  
В.М. Каневский
Keyword(s):  
Low Temperature ◽  
Plasma Treatment ◽  
High Resistance ◽  
Treatment Process ◽  
Nitrogen Plasma ◽  
Rutile Structure ◽  
Open Atmosphere ◽  
High Productivity ◽  
Sapphire Substrates ◽  
Superhard Coatings

Results of the formation of superhard coatings in the low-temperature nitrogen plasma treatment process in the open atmosphere of titanium films on sapphire substrates are given. It is shown that during plasma treatment a coating of nitrogen-containing TiO2 with rutile structure is formed with a double increase (in comparison with rutile TiO2) of microhardness (up to 27 GPa). The application of this coating leads to hardening of the surface of sapphire plates by 22-23%. High productivity and implementation of synthesis in an open atmosphere make it possible to consider the proposed procedure is promising for the production of superhard coatings with high resistance to oxygen.

Sign in / Sign up

Export Citation Format

Share Document