Microstructure, Mechanical Property, and Linear Expansion Coefficient of ZrO2@Diamond/2024 Composite
Source abstract
Abstract
This study investigates the preparation and properties of diamond/2024 composites with a diamond content of 15 vol% and ZrO2‐coated diamond/2024 composites (ZrO2@diamond/2024). ZrO2 is coated onto diamond particles using evaporation crystallization, and the effects of different thermal decomposition temperatures and durations on the coating are examined. The results show that a smooth and uniform ZrO2 coating is achieved at a thermal decomposition temperature of 600 °C with a holding time of 2 h. In diamond/2024 composites, noticeable voids are observed at the interface, while the ZrO2@diamond/2024 composites exhibit a flat, well‐bonded interface without cracks, voids, or Al4C3 formation. The ZrO2 coating effectively prevents direct contact between diamond and aluminum melt, inhibiting Al4C3 formation, which leads to a tensile strength increase of ZrO2@diamond/2024 composites to 200.1 MPa, 10.8% higher than the uncoated composites. Additionally, the linear expansion coefficient and dimensional change rate of ZrO2@diamond/2024 composites are lower than those of diamond/2024 composites, indicating better interface bonding and thermal expansion constraint.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Concrete and Cement Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Faculty of Material Science and Engineering Kunming University of Science & Technology Kunming 650093 China
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