In Situ Formation of NbC Reinforced Ni3Si Intermetallic Compounds by Laser Cladding

Yao Ning Sun; Ding Fan; Yu Feng Zheng; Min Zheng; Jian Bin Zhang

doi:10.4028/www.scientific.net/KEM.368-372.1351

Paper Titles

Modeling and Simulation of Ceramic/Metal Gradient Thermal Barrier Coating
p.1337

Coupled Thermomechanical Analyses for Thermal Shock of Ceramic/Metal Gradient Thermal Barrier Coatings
p.1341

Residual Stress and Stability of Thermal Barrier Coatings during Cyclic Thermal Loading
p.1344

A XPS Study of Atmospheric Plasma Sprayed TiB₂ Coatings
p.1347

In Situ Formation of NbC Reinforced Ni₃Si Intermetallic Compounds by Laser Cladding
p.1351

Pressure-Dependent Characteristics and Properties of Al₂O₃-SiO₂ Thin Films Deposited on PET
p.1354

Effects of SrAl₂O₄ Homo-Buffer Layer on SrAl₂O₄:Eu Phosphors Film Grown on Glass by RF Sputtering
p.1358

Triboluminescence of SrAl₂O₄:Eu Film with Strong Adhesion Fabricated by a Combination of RF Magnetron Sputtering and Post-Annealing Treatment
p.1362

Magnetite Nanoparticles Surface Coating SiO₂ and Magnetic Properties Evaluation
p.1366

HomeKey Engineering MaterialsKey Engineering Materials Vols. 368-372In Situ Formation of NbC Reinforced Ni3Si...

In Situ Formation of NbC Reinforced Ni₃Si Intermetallic Compounds by Laser Cladding

Abstract:

Laser cladding technique was used to form Ni3Si intermetallic composite coating reinforced by in-situ formation NbC particles on Ni-based superalloy substrate. The process parameters were optimized to obtain cladding. The effect of Nb-C addition to the microstructure of the coating was investigated. The morphology of reinforcement particles was discussed. The experimental results showed that an excellent bonding between the coating and the substrate was ensured by a strong metallurgical interface. The clad coating was very good and free from cracks and pores. The microstructure of the coating was mainly composed of Ni(Si), Ni3(Si, Nb) and NbC. The NbC particles were formed by in-situ reaction between Nb and C during laser cladding process. NbC particles were homogeneously distributed in the composite material. Moreover, the maximum size of NbC particles was more than 4 μm.