Production of Ceramics Based on the Y2O3–ZrO2–HfO2 System for Casting Molds

Folomeikin, Yu. I.; Karachevtsev, F. N.; Stolyarova, V. L.

doi:10.1134/s0036023619070088

Russ. J. Inorg. Chem.

2019

DOI: 10.1134/s0036023619070088

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Production of Ceramics Based on the Y2O3–ZrO2–HfO2 System for Casting Molds

Yu. I. Folomeikin

F. N. Karachevtsev

V. L. Stolyarova

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Cited by 10 publications

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Reaction of a Molten Cr-Si-Base Alloy with Ceramics and a High Entropy Oxide

Pelchen,

Schenker,

Lepple

et al. 2024

High Temperature Corrosion of mater.

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Due to their higher thermal and chemical stability than other high-temperature materials, chromium-silicon-base (Cr-Si-base) alloys are promising materials for future gas turbines and other high-temperature applications operating under harsh conditions. To enable near-net-shape casting of Cr-Si-base alloys, a compatibility of the alloy melt with the ceramic crucibles and molds is necessary. Additionally, a metal-ceramic contact exists at the interface between thermal barrier coating (TBC) and alloy, where metallic may melts play a role in the case of coating failure and overheating. In this study, molten Cr92Si8 (in at. %) alloy is brought into contact with powders of ceramics commonly used for casting molds or crucibles (e.g. ZrSiO4, Al2O3, 3YSZ), to investigate liquid metal corrosion, interdiffusion, and stabilities. Additionally, the high entropy oxide (Sm0.2Gd0.2Dy0.2Er0.2Yb0.2)2Zr2O7 (HEO), a potential future TBC material, is investigated. Before melting using an electric arc furnace, the powders of the investigated ceramics were mixed with pulverized Cr92Si8 and pressed into alloy-ceramic pairs, to maximize the contact area between molten metal and ceramic. For microstructural investigations and phase analysis, the materials were assessed using scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The widely used mold material ZrSiO4 and the coating BN were found to decompose, while reaction products of SiO2 and CoAl2O4 with the melt were detected. Al2O3, 3YSZ, and the HEO did not show decomposition or corrosion by the melt. Al2O3, 3YSZ, and the HEO are therefore considered as promising crucible, mold, and TBC materials for Cr-Si-base alloys.

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Reaction of a Molten Cr-Si-Base Alloy with Ceramics and a High Entropy Oxide

Pelchen,

Schenker,

Lepple

et al. 2024

High Temperature Corrosion of mater.

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Kinetic stability and rheological properties of photosensitive zirconia suspensions for DLP printing

Sokola

Kalina

Smilek

et al. 2023

Ceramics International

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Investigation of the Physicochemical Properties of Ceramics in the Sm2O3–Y2O3–HfO2 System for Developing Promising Thermal Barrier Coatings

Каблов

Doronin

Artemenko

et al. 2020

Russ. J. Inorg. Chem.

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Production of Ceramics Based on the Y2O3–ZrO2–HfO2 System for Casting Molds

Cited by 10 publications

References 9 publications

Reaction of a Molten Cr-Si-Base Alloy with Ceramics and a High Entropy Oxide

Reaction of a Molten Cr-Si-Base Alloy with Ceramics and a High Entropy Oxide

Kinetic stability and rheological properties of photosensitive zirconia suspensions for DLP printing

Investigation of the Physicochemical Properties of Ceramics in the Sm2O3–Y2O3–HfO2 System for Developing Promising Thermal Barrier Coatings

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