Failure mechanism of the Y2O3 doped BaZrO3/Al2O3 composite ceramic mould during directional solidification of TiAl-Based alloys

Duan, Baohua; Feng, Qisheng; Jiao, Lina; Zhang, Xuexian; Mao, Lu; Xiong, Fuhao; Yang, Yuchen; Lu, Xionggang; Chen, Guangyao; Li, Chonghe

doi:10.1016/j.ceramint.2021.10.232

Cited by 15 publications

(3 citation statements)

References 36 publications

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“…Therefore, research is being conducted for applications in various industrial products, such as molds, precision parts, and semiconductor components. Duan et al (2022) described the failure mechanism of a composite ceramic mold during the directional solidification of TiAl-based alloys. Zhao et al (2022) demonstrated the applicability of ultra precision aerostatic bearings by creating porous alumina by mixing γ-alumina and α-alumina powders and verifying their material properties.…”

Section: Introductionmentioning

confidence: 99%

Through-hole drilling characteristics of alumina ceramics using diamond-coated carbide drill

OKADA,

HIRATA,

WATANABE

et al. 2024

JAMDSM

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The drilling characteristics of alumina ceramics during through-hole drilling with a diamond-coated carbide drill were investigated experimentally. The drilling characteristics were evaluated by cutting edge behavior, cutting force (thrust force and torque), and chipping state at the exit side of the drilled hole in relation to the number of drilled holes. Additionally, the effects of the diamond-coating thickness and drill feed rate were investigated. The drills had a typical twist shape and were made of tungsten carbide base material with diamond coatings at 10 µm and 20 µm thick. The drilling machine was a standard machining center with a simple unidirectional drill feed without vibration. In through-hole drilling, as in blind-hole drilling, the coating on the rake face flaked during the initial stage of drilling, resulting in a sharp cutting edge on the diamond-coating ridge remaining on the flank face. However, flaking of the diamond coating on the rake face was observed earlier during through-hole drilling than in blind-hole drilling. Although the chipping area increased with increasing drill feed rate, coating flaking on the rake face significantly suppressed it at all feed rates. There was a clear correlation between the chipping area and cutting force since the chipping area decreased with decreasing thrust force. Before the theoretical hole penetration, hat-shaped chipping was observed with two crack propagation directions, accompanied by a sharp decrease in thrust force. Moreover, even after observing a sharp decrease in thrust force, a gradual decrease in thrust force was observed in the case of a good chipping state. The chipping area was significantly improved by reducing the coating thickness, and the thrust force was reduced.

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Section: Introductionmentioning

confidence: 99%

Through-hole drilling characteristics of alumina ceramics using diamond-coated carbide drill

OKADA,

HIRATA,

WATANABE

et al. 2024

JAMDSM

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show abstract

“…for vacuum induction melting of titanium alloys. Although zirconate refractories possess high melting points and good high‐temperature stability, they are brittle and exhibit poor thermal shock resistance during service 19,20 . Therefore, the key challenge in the smelting of pure TiAl alloys is in the development of reliable refractory crucibles.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of CaAl₁₂O₁₉–CaTiO₃ composites and their potential usage for TiAl alloy smelting

et al. 2023

J Am Ceram Soc.

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CaAl12O19–CaTiO3 (CA6–CT) materials are fabricated using a solid sintering method to investigate the effects of TiO2 content on the phase composition, properties, and microstructure of the materials. With increasing TiO2 content, the preferential replacement of Al3+ by Ti4+ in the CA6 crystal increases the concentration of vacancy defects, thereby promoting ion diffusion and mass transfer, which improves the sintering reaction activity. However, as more TiO2 is added, the CaTiO3 phase formed increases the thermal conductivity and mean expansion coefficient of the material at high temperatures, which degrades its thermal shock stability. The CA6–CT refractory showed good corrosion resistance to the Ti6Al4V melt. Except for a slight penetration of iron element, no obvious corrosion occurred at the reaction interface.

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“…12 A high adhesion energy is generally perceived as attributable to the wetting or the chemical reaction between the melt and the solid crucible. 13,14 As the most highly active metal in raw materials, Cd causes many chemical reactions at high temperatures, which should be focused on. The moisture contained in the material, crucible and atmosphere is extremely chemically reactive with many metals.…”

Section: Introductionmentioning

confidence: 99%

Study on the trace moisture influence on the adhesion phenomenon in Cd-based crystal growth

et al. 2023

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Failure mechanism of the Y2O3 doped BaZrO3/Al2O3 composite ceramic mould during directional solidification of TiAl-Based alloys

Cited by 15 publications

References 36 publications

Through-hole drilling characteristics of alumina ceramics using diamond-coated carbide drill

Through-hole drilling characteristics of alumina ceramics using diamond-coated carbide drill

Fabrication of CaAl₁₂O₁₉–CaTiO₃ composites and their potential usage for TiAl alloy smelting

Study on the trace moisture influence on the adhesion phenomenon in Cd-based crystal growth

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Failure mechanism of the Y2O3 doped BaZrO3/Al2O3 composite ceramic mould during directional solidification of TiAl-Based alloys

Cited by 15 publications

References 36 publications

Through-hole drilling characteristics of alumina ceramics using diamond-coated carbide drill

Through-hole drilling characteristics of alumina ceramics using diamond-coated carbide drill

Fabrication of CaAl12O19–CaTiO3 composites and their potential usage for TiAl alloy smelting

Study on the trace moisture influence on the adhesion phenomenon in Cd-based crystal growth

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Product

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Fabrication of CaAl₁₂O₁₉–CaTiO₃ composites and their potential usage for TiAl alloy smelting