Synthesis and characterization of multilayered TiC/TiB2 coatings deposited by ion beam assisted, electron beam-physical vapor deposition (EB-PVD)

Douglas Edward Wolfe, Jogender Singh, Krishnan Narasimhan

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Abstract

Polycrystalline 4 μm and 14 μm thick multilayer TiB2/TiC coatings with varying number of total layers (2-20) were deposited by ion beam assisted, electron beam-physical vapor deposition (IBA, EB-PVD) on WC-6wt.%Co-0.3wt.%TaC substrates. The average Vicker's hardness numbers were found to increase with increasing total number of layers and ranged from 3215 VHN0.050 to 3726 VHN0.050 and 3294 VHN0.050 to 3991 VHN0.050 for the 4 μm and 14 μm thick multilayer TiB2/TiC coatings, respectively. The adhesion of the multilayer coatings was found to be greater than 50 N for a 4 μm thick film and less than 30 N for the thicker films. The degree of crystallographic texture was found to change with varying total number of layers, as well as the orientation of both materials within the multilayer system. The grain size and amount of residual compressive stress was found to decrease with increasing number of layers. In addition, the fracture toughness was found to decrease with increasing total number of layers. This paper discusses the effect of changing the individual layer thickness (i.e. total number of layers) for TiC/TiB2 multilayer coatings deposited on WC-6wt.%Co-0.3wt.%TaC cutting inserts on the average Vicker's hardness number, 2 adhesion, stress, fracture toughness, argon impurities, average crystallite size, crystallographic texture, surface morphology and microstructure using a variety of characterization techniques.

Original languageEnglish (US)
Pages (from-to)8-25
Number of pages18
JournalSurface and Coatings Technology
Volume165
Issue number1
DOIs
StatePublished - Feb 3 2003

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Physical vapor deposition
Ion beams
Electron beams
Multilayers
ion beams
vapor deposition
electron beams
coatings
Coatings
synthesis
Vickers hardness
Thick films
Fracture toughness
Adhesion
Textures
fracture strength
thick films
Argon
adhesion
textures

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

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title = "Synthesis and characterization of multilayered TiC/TiB2 coatings deposited by ion beam assisted, electron beam-physical vapor deposition (EB-PVD)",
abstract = "Polycrystalline 4 μm and 14 μm thick multilayer TiB2/TiC coatings with varying number of total layers (2-20) were deposited by ion beam assisted, electron beam-physical vapor deposition (IBA, EB-PVD) on WC-6wt.{\%}Co-0.3wt.{\%}TaC substrates. The average Vicker's hardness numbers were found to increase with increasing total number of layers and ranged from 3215 VHN0.050 to 3726 VHN0.050 and 3294 VHN0.050 to 3991 VHN0.050 for the 4 μm and 14 μm thick multilayer TiB2/TiC coatings, respectively. The adhesion of the multilayer coatings was found to be greater than 50 N for a 4 μm thick film and less than 30 N for the thicker films. The degree of crystallographic texture was found to change with varying total number of layers, as well as the orientation of both materials within the multilayer system. The grain size and amount of residual compressive stress was found to decrease with increasing number of layers. In addition, the fracture toughness was found to decrease with increasing total number of layers. This paper discusses the effect of changing the individual layer thickness (i.e. total number of layers) for TiC/TiB2 multilayer coatings deposited on WC-6wt.{\%}Co-0.3wt.{\%}TaC cutting inserts on the average Vicker's hardness number, 2 adhesion, stress, fracture toughness, argon impurities, average crystallite size, crystallographic texture, surface morphology and microstructure using a variety of characterization techniques.",
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AU - Singh, Jogender

AU - Narasimhan, Krishnan

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N2 - Polycrystalline 4 μm and 14 μm thick multilayer TiB2/TiC coatings with varying number of total layers (2-20) were deposited by ion beam assisted, electron beam-physical vapor deposition (IBA, EB-PVD) on WC-6wt.%Co-0.3wt.%TaC substrates. The average Vicker's hardness numbers were found to increase with increasing total number of layers and ranged from 3215 VHN0.050 to 3726 VHN0.050 and 3294 VHN0.050 to 3991 VHN0.050 for the 4 μm and 14 μm thick multilayer TiB2/TiC coatings, respectively. The adhesion of the multilayer coatings was found to be greater than 50 N for a 4 μm thick film and less than 30 N for the thicker films. The degree of crystallographic texture was found to change with varying total number of layers, as well as the orientation of both materials within the multilayer system. The grain size and amount of residual compressive stress was found to decrease with increasing number of layers. In addition, the fracture toughness was found to decrease with increasing total number of layers. This paper discusses the effect of changing the individual layer thickness (i.e. total number of layers) for TiC/TiB2 multilayer coatings deposited on WC-6wt.%Co-0.3wt.%TaC cutting inserts on the average Vicker's hardness number, 2 adhesion, stress, fracture toughness, argon impurities, average crystallite size, crystallographic texture, surface morphology and microstructure using a variety of characterization techniques.

AB - Polycrystalline 4 μm and 14 μm thick multilayer TiB2/TiC coatings with varying number of total layers (2-20) were deposited by ion beam assisted, electron beam-physical vapor deposition (IBA, EB-PVD) on WC-6wt.%Co-0.3wt.%TaC substrates. The average Vicker's hardness numbers were found to increase with increasing total number of layers and ranged from 3215 VHN0.050 to 3726 VHN0.050 and 3294 VHN0.050 to 3991 VHN0.050 for the 4 μm and 14 μm thick multilayer TiB2/TiC coatings, respectively. The adhesion of the multilayer coatings was found to be greater than 50 N for a 4 μm thick film and less than 30 N for the thicker films. The degree of crystallographic texture was found to change with varying total number of layers, as well as the orientation of both materials within the multilayer system. The grain size and amount of residual compressive stress was found to decrease with increasing number of layers. In addition, the fracture toughness was found to decrease with increasing total number of layers. This paper discusses the effect of changing the individual layer thickness (i.e. total number of layers) for TiC/TiB2 multilayer coatings deposited on WC-6wt.%Co-0.3wt.%TaC cutting inserts on the average Vicker's hardness number, 2 adhesion, stress, fracture toughness, argon impurities, average crystallite size, crystallographic texture, surface morphology and microstructure using a variety of characterization techniques.

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