Influences of modulation period on structure and properties of AlTiSiN/AlCrSiN nanocomposite multilayer coatings

Vacuum ◽  
2021 ◽  
pp. 110516
Author(s):  
Y. Liu ◽  
H.D. Liu ◽  
Vasiliy Pelenovich ◽  
Q. Wan ◽  
J.L. Guo ◽  
...  
Keyword(s):  
Multilayer Coatings ◽  
Structure And Properties ◽  
Modulation Period

scholarly journals Deposition and Properties of Amorphous TiBN/AlCrYN Multilayer Coatings with Various Modulation Periods

Scanning ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Wei Dai ◽  
Fan Liu ◽  
Qimin Wang
Keyword(s):  
Amorphous Structure ◽  
Oxidation Temperature ◽  
Diffusion Control ◽  
Multilayer Coatings ◽  
X Ray Diffraction ◽  
Outward Diffusion ◽  
Modulation Period ◽  
Thermogravimetric Analyzer ◽  
Coating Surface ◽  
Aluminum Oxide Layer

In this paper, multilayer coatings consisted of amorphous AlCrYN layers and TiBN layers were deposited by the cosputtering technique. The influence of the modulation period of the multilayer coatings on the structure, mechanical properties, and oxidation behavior of the coatings was studied carefully by using scanning electron microscope, X-ray diffraction, nanoindentation, scratch tester, and thermogravimetric analyzer. The results show that the TiBN/AlCrYN multilayer coatings exhibit an amorphous structure without any feature. Decreasing the modulation period could significantly improve the coating hardness and elastic modulus. In addition, the adhesion of the multilayer coatings could be enhanced as the modulation period decreases. At relative low oxidation temperature (≤900°C), a dense aluminum oxide layer formed on the coating surface can effectively hinder the inward diffusion of O and the outward diffusion of metal elements. The oxidation behaviors of the TiBN/AlCrYN multilayer coatings obeyed the diffusion control law. The oxidation resistance of the coatings was increasing with decreasing the modulation period since the interfaces of multilayer structures would block the diffusion of elements. At relative high oxidation temperature (1000°C), however, the coating surface was rapidly oxidized into the porous TiO2 whiskers rather than the dense Al2O3 layer, resulting in the inward diffusion of O and thus causing the serious oxidation of the coatings.

The structure and properties of bioactive multilayer coatings applied by a low-energy electron beam on the implant surface

2019 ◽  
Vol 378 ◽  
pp. 124969
Author(s):  
Yiming Liu ◽  
A.V. Rogachev ◽  
V.A. Yarmolenko ◽  
A.A. Rogachev ◽  
Xiaohong Jiang ◽  
...  
Keyword(s):  
Electron Beam ◽  
Low Energy ◽  
Energy Electron ◽  
Multilayer Coatings ◽  
Structure And Properties ◽  
Implant Surface ◽  
Low Energy Electron

scholarly journals Nanocomposite Multilayer Binary Nitride Coatings Based on Transition and Refractory Metals: Structure and Properties

Coatings ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 155 ◽  
Author(s):  
Alexander Pogrebnjak ◽  
Kateryna Smyrnova ◽  
Oleksandr Bondar
Keyword(s):  
Physical Vapor Deposition ◽  
Refractory Metals ◽  
Multilayer Coatings ◽  
Structure And Properties ◽  
Substrate Bias Voltage ◽  
Wear And Corrosion ◽  
Structure Of Coatings ◽  
Influence Of Substrate ◽  
Wear And Corrosion Resistance ◽  
Constant Interest

One area of constant interest in many fields of industry is development of functional multilayer coatings that possess excellent performance characteristics. That is why in our brief review the results of studies of structure and properties of multilayer structures based on binary nitrides of transition or refractory metals obtained by various physical-vapor deposition (PVD) techniques are presented. The influence of substrate temperature, substrate bias voltage, bilayer thickness and interface boundaries on the structure of coatings and their properties, such as hardness, plasticity, wear and corrosion resistance, are discussed in detail. This review may be useful for students and growing community of researchers interested in the synthesis-structure-properties relationship in multilayer coatings based on metal nitrides.

Structure of second phases in TiAl alloys containing Cr and B

1991 ◽  
Vol 49 ◽  
pp. 576-577
Author(s):  
Ernest L. Hall ◽  
Shyh-Chin Huang
Keyword(s):  
Grain Size ◽  
Second Phase ◽  
Structure And Properties ◽  
Tial Alloys ◽  
Second Phases ◽  
Interstitial Elements

Addition of interstitial elements to γ-TiAl alloys is currently being explored as a method for improving the properties of these alloys. Previous work in which a number of interstitial elements were studied showed that boron was particularly effective in refining the grain size in castings, and led to enhanced strength while maintaining reasonable ductility. Other investigators have shown that B in γ-TiAl alloys tends to promote the formation of TiB2 as a second phase. In this study, the microstructure of Bcontaining TiAl alloys was examined in detail in order to describe the mechanism by which B alters the structure and properties of these alloys.

Relationships between hierarchical structure and properties in macromolecular systems

1987 ◽  
Vol 45 ◽  
pp. 440-443
Author(s):  
E. Baer
Keyword(s):  
Uniaxial Tension ◽  
Hierarchical Structure ◽  
Inorganic Material ◽  
Hierarchical Structures ◽  
Bone Collagen ◽  
Structure And Properties ◽  
Connective Tissues ◽  
Scale Level ◽  
Fibrous Protein ◽  
Macromolecular Systems

The most advanced macromolecular materials are found in plants and animals, and certainly the connective tissues in mammals are amongst the most advanced macromolecular composites known to mankind. The efficient use of collagen, a fibrous protein, in the design of both soft and hard connective tissues is worthy of comment. Very crudely, in bone collagen serves as a highly efficient binder for the inorganic hydroxyappatite which stiffens the structure. The interactions between the organic fiber of collagen and the inorganic material seem to occur at the nano (scale) level of organization. Epitatic crystallization of the inorganic phase on the fibers has been reported to give a highly anisotropic, stress responsive, structure. Soft connective tissues also have sophisticated oriented hierarchical structures. The collagen fibers are “glued” together by a highly hydrated gel-like proteoglycan matrix. One of the simplest structures of this type is tendon which functions primarily in uniaxial tension as a reinforced elastomeric cable between muscle and bone.

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