TY - JOUR
T1 - Exploring the evolution of pores in HIPed Y2O3 transparent ceramics
AU - Wang, Ying
AU - Wang, Jun
AU - Ni, Meng
AU - Liu, Peng
AU - Zhang, Jian
AU - Lee, Kuo Yang
AU - Hsiang, Hsing I.
AU - Dong, Zhili
AU - Tang, Dingyuan
N1 - Funding Information:
The research is partially supported by the fund of A*Star of Singapore (Grant No. A1883C0003 ), the fund of Ministry of Education (MOE), Singapore (Grant No. 2018-T1-001-145 ), the fund of Ministry of Science and Technology Taiwan ( MOST 109-2221-E-006-235-MY3 ), the National Natural Science Foundation of China (Grant No. 61875078 , 51702135 ); and Natural Science Foundation of Jiangsu Province (Grant No. BK20191002 ).
Publisher Copyright:
© 2021 Elsevier Ltd and Techna Group S.r.l.
PY - 2021/4/15
Y1 - 2021/4/15
N2 - Y2O3 transparent ceramics were fabricated by using vacuum sintering followed by hot isostatic pressing (HIPing). After HIP, large pores were eliminated, but a certain amount of nano-sized pores survived. Air annealing is required to bleach the as-HIPed ceramics. However, the annealing temperatures affected the transparency by affecting the evolution of the residual nano-pores. A high annealing temperature of ≥1600 °C resulted in obvious pore growth and loss of transparency of the samples. Pressure-less thermal expansion and shrinkage behaviors of the as-HIPed Y2O3 ceramics were studied in detail. The high annealing temperature (1600 °C) could lead to obvious swelling of both the pore sizes and the dimensions of the samples. It implies that the swelling of pores is not only from the diffusion and aggregation of the existing smaller pores, but may also from the thermal expansion of the high-pressure precipitated insoluble gas.
AB - Y2O3 transparent ceramics were fabricated by using vacuum sintering followed by hot isostatic pressing (HIPing). After HIP, large pores were eliminated, but a certain amount of nano-sized pores survived. Air annealing is required to bleach the as-HIPed ceramics. However, the annealing temperatures affected the transparency by affecting the evolution of the residual nano-pores. A high annealing temperature of ≥1600 °C resulted in obvious pore growth and loss of transparency of the samples. Pressure-less thermal expansion and shrinkage behaviors of the as-HIPed Y2O3 ceramics were studied in detail. The high annealing temperature (1600 °C) could lead to obvious swelling of both the pore sizes and the dimensions of the samples. It implies that the swelling of pores is not only from the diffusion and aggregation of the existing smaller pores, but may also from the thermal expansion of the high-pressure precipitated insoluble gas.
UR - https://www.scopus.com/pages/publications/85099316797
UR - https://www.scopus.com/pages/publications/85099316797#tab=citedBy
U2 - 10.1016/j.ceramint.2021.01.002
DO - 10.1016/j.ceramint.2021.01.002
M3 - Article
AN - SCOPUS:85099316797
SN - 0272-8842
VL - 47
SP - 11637
EP - 11643
JO - Ceramics International
JF - Ceramics International
IS - 8
ER -