Related Experiment Video
Updated: May 12, 2026

Experimental Protocol to Investigate Particle Aerosolization of a Product Under Abrasion and Under Environmental Weathering
Published on: September 16, 2016
Mechanisms of Enhanced Thermal Durability in Porosity-Controlled Multilayer Thermal Barrier Coatings
Janghyeok Pyeon1, Kyung-Moo Kang2, Bong-Gu Kim1
1Department of Materials Convergence and System Engineering, School of Materials Science and Engineering, Changwon National University, Changwon 51140, Republic of Korea.
Abstract:
This study investigates the enhancement of thermal durability in multilayer yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBC) with porosity-controlled structures. Conventional single-layer YSZ and multilayer TBCs with dense and porous layers were fabricated by air plasma spraying and the TBC specimens were subjected to furnace cyclic testing. The single-layer TBC suffered from catastrophic delamination under cyclic thermal loading, driven by the mismatch in thermal expansion, while the multilayer TBCs exhibited a significant increase in thermal durability, by up to 50%. The relevant delamination mechanism was suggested with microstructural analysis, showing that the multilayer structure effectively relieved residual stresses by forming horizontal cracks, thereby mitigating crack propagation. This study emphasizes that the multilayer design in TBC with controlled porosity significantly enhances thermal durability, improving the operational lifespan of gas turbine hot components.
More Related Videos
09:41Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron
Published on: June 9, 2016
08:00Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
Related Concept Videos
Mechanism of heat transfer
Mechanisms of Heat Transfer I
Mechanisms of Heat Transfer II
Mechanisms of Heat Transfer
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant heat.