PROCESS CONTROL OF THERMAL BARRIER COATING SYSTEM BY CURRENT VARIANT CHANGES TO ALTER THE MICROSTRUCTURAL AND MECHANICAL CHARACTERISTICS

Process development of thermal barrier coatings story begins when thermal barrier coatings are being developed, suitably, for air craft industry and processes being modified for effective and efficient insurance of the thermal barrier coated parts. As these coatings are being tested initially for use in diesel engine. Thermal barrier coatings functioned at higher temperature along with compressive loads and thermal shocks. An effort is being carried out for the optimizing the thermal barrier coating system by changing the current variable as it have other variants also. To optimize the current as a variant in process controlling, TBC was developed by Air plasma spraying system and characterized by using, image analyzer for porosity and microstructures surface topography and Micro-Vickers hardness tester for hardness/mechanical effects on coatings. Significant results have been reported at 600 Amps for thermal barrier coatings.