A deeper insight into the design of creep resistant α-Al2O3/YAG fibers: Effects of seeding material and thermal treatment on the structural, microstructural and mechanical properties
Abstract
Polycrystalline α-alumina / yttrium-aluminum garnet (YAG) fibers were prepared from aqueous solutions of aluminum formoacetate and yttrium acetate, with α-Al 2 O 3 nanoparticles as a seeding material. α-Al 2 O 3 /YAG fiber production was achieved via dry-spinning, using polyvinylpyrrolidone as a spinning aid, followed by calcination and sintering of as-spun fibers at various temperature, dwell time and heating ramp. X-ray diffraction analysis evidenced the formation of transitional Al 2 O 3 and yttrium-aluminum perovskite (YAP) phases (1000-1300 °C) before a full conversion to α-Al 2 O 3 / YAG (76 / 24 wt%) at 1500 °C. Full densification required temperatures of at least 1400-1500 °C with a sufficient dwell time (30 min), while increasing sintering temperature induced grain growth. Depending on the thermal treatment, tensile strength and creep factor m of the related fibers could be tailored, either to higher strength at 1400 °C (up to 1149 MPa, m = 0.57) or higher creep at 1500 °C (up to 906 MPa, m = 0.69).
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BibTeX
@article{vergnaud2026deeper,
title = {{A deeper insight into the design of creep resistant α-Al2O3/YAG fibers: Effects of seeding material and thermal treatment on the structural, microstructural and mechanical properties}},
author = {Florestan Vergnaud and Elodie de Sousa and Eloïse Hyvernaud and Jenny Jouin and Lena Glaser and Ralf Herborn and Gaëlle Delaizir and Philippe Thomas and Arne Rüdinger and Samuel Bernard},
journal = {Open Ceramics},
year = {2026},
month = oct,
doi = {10.1016/j.oceram.2026.101027},
url = {https://unilim.hal.science/hal-05799820v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - A deeper insight into the design of creep resistant α-Al2O3/YAG fibers: Effects of seeding material and thermal treatment on the structural, microstructural and mechanical properties
AU - Florestan Vergnaud
AU - Elodie de Sousa
AU - Eloïse Hyvernaud
AU - Jenny Jouin
AU - Lena Glaser
AU - Ralf Herborn
AU - Gaëlle Delaizir
AU - Philippe Thomas
AU - Arne Rüdinger
AU - Samuel Bernard
PY - 2026
DA - 2026/10/14
JO - Open Ceramics
DO - 10.1016/j.oceram.2026.101027
UR - https://unilim.hal.science/hal-05799820v1
AB - Polycrystalline α-alumina / yttrium-aluminum garnet (YAG) fibers were prepared from aqueous solutions of aluminum formoacetate and yttrium acetate, with α-Al 2 O 3 nanoparticles as a seeding material. α-Al 2 O 3 /YAG fiber production was achieved via dry-spinning, using polyvinylpyrrolidone as a spinning aid, followed by calcination and sintering of as-spun fibers at various temperature, dwell time and heating ramp. X-ray diffraction analysis evidenced the formation of transitional Al 2 O 3 and yttrium-aluminum perovskite (YAP) phases (1000-1300 °C) before a full conversion to α-Al 2 O 3 / YAG (76 / 24 wt%) at 1500 °C. Full densification required temperatures of at least 1400-1500 °C with a sufficient dwell time (30 min), while increasing sintering temperature induced grain growth. Depending on the thermal treatment, tensile strength and creep factor m of the related fibers could be tailored, either to higher strength at 1400 °C (up to 1149 MPa, m = 0.57) or higher creep at 1500 °C (up to 906 MPa, m = 0.69).
SN - 2666-5395
ER -