Damage evolution in a self‐healing air plasma sprayed thermal barrier coating containing self‐shielding MoSi 2 particles

High-temperature degradation of plasma sprayed thermal barrier coating systems

Thermal barrier coating systems (TBCs) are used in gas turbines to prevent high-temperature degradation of metallic materials in the combustor and turbine. One of the main concerns regarding TBCs is poor reliability, and accurate life prediction models are necessary in order to fully utilise the beneficial effects of TBCs. This research project aims at developing deeper understanding of the deg...

Thermal Fatigue Behavior of Air-Plasma Sprayed Thermal Barrier Coating with Bond Coat Species in Cyclic Thermal Exposure

The effects of the bond coat species on the delamination or fracture behavior in thermal barrier coatings (TBCs) was investigated using the yclic thermal fatigue and thermal-shock tests. The interface microstructures of each TBC showed a good condition without cracking or delamination after flame thermal fatigue (FTF) for 1429 cycles. The TBC with the bond coat prepared by the air-plasma spray ...

Failure analysis of suspension plasma sprayed thermal barrier coatings

Simulation of stresses and delamination in a plasma-sprayed thermal barrier system upon thermal cycling

A thermal barrier system with plasma-sprayed thermal barrier coating (TBC) has been analyzed subject to thermal cycling. The thermally grown oxide (TGO) is allowed to grow at the peak temperature in the cycle, with both thickening and lateral components of the growth strain. The stresses in the TGO are also allowed to relax at high temperature when they attain a critical level. The bond coat is...

Thermal-sprayed Silver-containing Hydroxyapatite Coating in a Rat Femoral Model: Analysis of the Initial Fixation

Introduction: The degree of osseointegration determines the long-term survival and favorable outcomes of orthopedic implant use. Initial fixation is influenced by a number of factors. Hydroxyapatite (HA) coating has a good osteoconductive property and sealing effect on peri implant migration of particles that lead to osteolysis. Furthermore, HA-coated implants show desirable midterm clinical re...