| Effect of Yb2O3 Addition and Sintering Temperature on
the Densification Behavior of Magnesium Aluminate Spinel
Powder |
Siya Zeng,a, c Yuan Xiang,a, b, c Jianhua Liu,a, b, c, * Junwen Zhou,a, c Guangping Wanga, c and
Ziming Huanga, c
Pages : 134-139
DOI : 10.1080/0371750X.2024.2351944 |
| Abstract |
| The effect of Yb2O3 and sintering temperature on the densification behavior of
magnesium aluminate spinel powder was studied. Results showed that Yb2O3 was
beneficial to the sintering densification of MgAl2O4. When the content of Yb2O3 was
3 wt%, the relative density of magnesium aluminium spinel (MAS) was 98.54%, and
the microstructure was more compact. The maximum hardness was 21.48 GPa, and
the second phase Yb3Al5O12 appeared in the 3 wt% Yb2O3 samples. The mechanism of
Yb2O3 in promoting the sintering densification of MAS is due to the appearance of
Yb3Al5O12. When the sintering temperature is 1700oC, the relative density of MAS
reaches a maximum of 98.54%, the hardness also reaches a maximum value of 21.48
GPa, and the grain size is more uniform. When the temperature exceeds 1700oC, the
relative density and hardness of MAS decrease. The best sintering aid content and
temperature synergistically worked to promote the densification and increased the
hardness of MAS.
[Keywords: Yb2O3, Magnesium aluminate spinel, Sintering temperature, Densification,
Hardness] |
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