Influence of Modifiers on the Structure and Properties of Composite Coatings System Ti-B-Fe

2014 ◽  
Vol 880 ◽  
pp. 80-87
Author(s):  
Nina K. Galchenko ◽  
Ksenia A. Kolesnikova ◽  
S.I. Belyuk ◽  
B.V. Dampilon
Keyword(s):  
Electron Beam ◽  
Composite Coatings ◽  
Reactive Diffusion ◽  
Amorphous Boron ◽  
Structure And Properties ◽  
Coating Structure ◽  
Equilibrium Crystallization ◽  
Structure Degradation ◽  
Boride Coatings ◽  
Two Factors

The paper studies how microalloying with amorphous boron (Bam) and zirconia (ZrO2) influences the structure and properties of boride coatings. Two factors are found to strongly affect the structure and phase formation in composite coatings produced by electron beam surfacing, especially when using thermoreactive powders: (i) high reactive diffusion between the composite and substrate components, which causes the coating structure degradation, and (ii) slight deviations from phase concentrations and equilibrium crystallization, which give rise to such nonequilibrium phases in the coating structure under the electron beam as ferroboron, ferrotitanium and binary eutectics.

Structure and Properties of Boride Coatings Synthesized from Thermo-Reactive Powders during Electron-Beam Surfacing

2014 ◽  
Vol 880 ◽  
pp. 265-271 ◽  
Author(s):  
Nina K. Galchenko ◽  
Ksenia A. Kolesnikova ◽  
S.I. Belyuk ◽  
B.V. Dampilon
Keyword(s):  
Electron Beam ◽  
Composite Coatings ◽  
Structure And Properties ◽  
Wear Resistant ◽  
Titanium Borides ◽  
Boride Coatings

The wear resistant composite coatings on the basis of titanium borides, which are synthesized from thermoreactive powder components of a boron-containing mixture at electron beam surfacing, are interesting for applications today.

Boride Coatings Structure and Properties, Produced by Atmospheric Electron-Beam Cladding

2011 ◽  
Vol 287-290 ◽  
pp. 26-31 ◽  
Author(s):  
Alexandr Teplykh ◽  
Mikhail Golkovskiy ◽  
Anatoly Bataev ◽  
Ekaterina Drobyaz ◽  
Sergey V. Veselov ◽  
...  
Keyword(s):  
Electron Beam ◽  
Peak Level ◽  
Xrd Analysis ◽  
Uniform Structure ◽  
Amorphous Boron ◽  
Structure And Properties ◽  
Layered Coatings ◽  
Boride Coatings ◽  
Fracture Features

Structure, microhardness and fracture features of coatings produced by atmospheric electron-beam cladding of amorphous boron were investigated. The coatings were produced by cladding of one, two and three layers of powder. Produced coatings thickness is 550, 750 and 900 μm respectively. The peak level of microhardness is 14000…16000 MPa. By the means of XRD analysis it is stated that the main phases of strengthened layers are FeB and Fe2B borides and eutectic (α-Fe + Fe2B). The coatings after one layer cladding have non-uniform structure with microvolumes having lack of borides. Three-layered coatings are noted for their high brittleness. The best properties are presented by two-layer coatings.

Processing and Properties of Nanostructured Alloy Coatings in the Binary Ni-Cr System

2005 ◽  
Vol 903 ◽  
Author(s):  
Pablo Castro ◽  
Christopher A. Schuh ◽  
Hong Liang
Keyword(s):  
Solid Lubricant ◽  
Composite Coatings ◽  
Tribological Performance ◽  
Hard Material ◽  
Structure And Properties ◽  
Coating Structure ◽  
Electrodeposition Process ◽  
Cr System ◽  
Steel Substrates ◽  
Disk Testing

AbstractUsing a scalable electrodeposition process, nanocrystalline Ni-Cr alloy coatings have been produced on copper and steel substrates, and the roles of various processing variables on the resulting coating structure and properties have been investigated. The possibility of producing composite coatings of wear resistant nanostructured Ni-Cr alloys containing graphite or MoS2 particles has also been studied; the co-deposition of solid lubricant particles improved the tribological performance of the coatings in ball-on-disk testing. The combination of a hard material such as nanocrystalline Ni-Cr alloy with a solid lubricant has a great potential for new surface modification developments.

The structure and properties of boron carbide ceramics modified by high-current pulsed electron-beam

2016 ◽  
Author(s):  
Yuri Ivanov ◽  
Oleg Tolkachev ◽  
Maria Petyukevich ◽  
Anton Teresov ◽  
Olga Ivanova ◽  
...  
Keyword(s):  
Electron Beam ◽  
Boron Carbide ◽  
Structure And Properties ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Carbide Ceramics

Biocompatible Ceramic-Biopolymer Coatings Obtained by Electrophoretic Deposition on Electron Beam Structured Titanium Alloy Surfaces

2016 ◽  
Vol 879 ◽  
pp. 1552-1557
Author(s):  
C. Ramskogler ◽  
L. Cordero ◽  
Fernando Warchomicka ◽  
A.R. Boccaccini ◽  
Christof Sommitsch
Keyword(s):  
Titanium Alloy ◽  
Surface Modification ◽  
Electron Beam ◽  
Electrophoretic Deposition ◽  
Composite Coatings ◽  
Substrate Surface ◽  
3D Structure ◽  
Titania Nanoparticles ◽  
Structured Surfaces ◽  
Major Interest

An area of major interest in biomedical engineering is currently the development of improved materials for medical implants. Research efforts are being focused on the investigation of surface modification methods for metallic prostheses due to the fundamental bioinert character of these materials and the possible ion release from their surfaces, which could potentially induce the interfacial loosening of devices after implantation. Electron beam (EB) structuring is a novel technique to control the surface topography in metals. Electrophoretic deposition (EPD) offers the feasibility to deposit at room temperature a variety of materials on conductive substrates from colloidal suspensions under electric fields. In this work single layers of chitosan composite coatings containing titania nanoparticles (n-TiO2) were deposit by EPD on electron beam (EB) structured Ti6Al4V titanium alloy. Surface structures were designed following different criteria in order to develop specific topography on the Ti6Al4V substrate. n-TiO2 particles were used as a model particle in order to demonstrate the versatility of the proposed technique for achieving homogenous chitosan based coatings on structured surfaces. A linear relation between EPD time and deposition yield on different patterned Ti6Al4V surfaces was determined under constant voltage conditions, obtaining homogeneous EPD coatings which replicate the 3D structure (pattern) of the substrate surface. The present results show that a combination of both techniques can be considered a promising surface modification approach for metallic implants, which should lead to improved interaction between the implant surface and the biological environment for orthopaedic applications.

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