Thermal properties for Al2O3-based melt-grown ceramics prepared by laser-directed energy deposition
Source abstract
Abstract
Laser-directed energy deposition (LDED) has significant potential for the high-quality fabrication of complex structured ceramic components for high-temperature applications. However, a lack of understanding regarding the thermal properties limits the application of this technology in the preparation of melt-grown ceramics (MGCs). Herein, the thermal properties of Al 2O 3/trace mullite MGCs obtained using LDED and subsequent heat treatment are investigated, including thermal shock resistance and high-temperature strength. The findings demonstrate that the materials are vulnerable to thermal shock with cracking occurring at a temperature difference (Δ T) of 300 ℃. As the Δ T increases, the residual strength declines significantly due to the increased internal defects and thermal stresses in the samples. The high-temperature flexural strength decreases gradually with rising temperatures, reaching a value of 247.23 ± 39.26 MPa at 1000 ℃, demonstrating a retention rate of 47.17 %. This study provides a valuable reference for the practical high-temperature application of LDEDed Al 2O 3-based MGCs.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Glass properties and applications · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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