Properties evolution of plasma-sprayed La2Zr2O7 coating induced by pore structure evolution during thermal exposure
Source abstract
Abstract
Abstract To study the inter-lamellar pores evolution under thermal exposure and how it affects the coating properties, free standing atmospheric plasma sprayed (APS) La 2 Zr 2 O 7 (LZO) coating was subjected to thermal exposure at the temperatures of 1200 °C and 1300 °C for different durations. It was found that APS LZO coating experiences a rapid sintering during the early 5–20 h of thermal exposure. Such microstructure evolution behavior was attributed to the presence of the lamellar structure, which contains most 2D pores with a small inter-lamellar spacing. As a result, the density, inter-lamellar bonding ratio, mechanical properties and thermal conductivity of the LZO coating remarkably increase in about 20 h of thermal exposure. It was revealed that the evolution of the properties of the APS LZO coating during high temperature exposure is mainly ascribed to the shape change of the inter-lamellar pores for the formation of grain bridging in inter-lamellar pores.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Advanced ceramic materials synthesis · Nuclear Materials and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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