Ceramic Coating of TiC-TiB2 on 1Cr18Ni9Ti Substrate Achieved by Combustion Synthesis in High-Gravity Field

Zhong Min Zhao; Long Zhang; Yi Gang Song; Min Quan Wang

doi:10.4028/www.scientific.net/KEM.537.52

Paper Titles

A C/SiC Graded Coating on C/C Composites by LPCVD in the Methyltrichlorosilane/Hydrogen System
p.32

Effect of Yb₂SiO₅ Ceramic Layer Thickness on the Thermal Cycling Life of Yb₂SiO₅⁄LaMgAl₁₁O₁₉ Coating Deposited on C⁄SiC Composites
p.36

High Temperature In Situ Antioxidation Coating Fabricated by AAC Method
p.42

TiC-TiB₂ Coating on Ti-6Al-4V Alloy Substrate in Graded Composition Achieved by Fusion Bonding and Atomic Interdiffusion under Combustion Synthesis in High-Gravity Field
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Ceramic Coating of TiC-TiB₂ on 1Cr18Ni9Ti Substrate Achieved by Combustion Synthesis in High-Gravity Field
p.52

Investigation of Boron Nitride Prepared by Low Pressure Chemical Vapor Deposition at 650~1200 °C
p.58

Hardness and Wear Resistance of Ti-B-C-N Nanocomposite Coatings Synthesized by Multi-Target Magnetron Co-Sputtering
p.63

Preparation and Salt Spray Corrosion Resistance of Ni/BN and NiCrAl/BN Coatings
p.67

Microstructure and Properties of CrN Multilayer Coatings
p.71

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Ceramic Coating of TiC-TiB₂ on 1Cr18Ni9Ti Substrate Achieved by Combustion Synthesis in High-Gravity Field

Abstract:

Based on fusion bonding of liquid TiC-TiB₂ ceramic film to stainless steel substrate of 1Cr18Ni9Ti, the ceramic coating on stainless steel substrate was achieved in graded composition by combusion synthesis in high-gravity field. XRD, FESEM and EDS results showed the ceramic coating was composed of a number of fine TiB₂ platelets, irregular TiC grains and a few of Cr metallic binder and the inclusions of Al₂O₃ partilces, and physical and mechanical properties showed density, relative density, microhardness and fracture toughness of the ceramic coating were 4.25 g • cm-3, 98.2%, 24.6 GPa and 14.5 ± 3.5 MPa • m^0.5, respectively. The joint of TiC-TiB₂ ceramic coating on stainless steel substrate consisted of 3-layer structures, i.e. the ceramic coating, the intermediate and stainless steel substrate, and within the intermediate of Fe-Cr-Ni-Ti metallic matrix Ti-Fe enriched carbides decreased gradually both in volume fraction and particle size from the ceramic coating to stainless steel substrate in the presence of atomic unidirectional diffusion of Ti and C, while some isolated α-Al₂O₃ fine particles were also observed in the intermediate besides the presence of both some coarsened α-Al₂O₃ inclusions nearby the ceramic coating and the barrier layers of Al₂O₃ between the ceramic and the intermediate, so it is considered that the ceramic coating on stainless steel substrate is achieved partially by fusion bonding due to the poor incompatibilities between Al₂O₃ inclusions and the intermediate, resulting in the moderate shear strength of 125 ± 35 MPa between the ceramic coating and stainless steel substrate.