Sodium as densification aid in MgAl2O4 nanoceramics
Sodium as densification aid in MgAl2O4 nanoceramics
复制标题
钠作为 MgAl2O4 纳米陶瓷的致密化助剂
DOI:
10.1016/j.matlet.2022.132693
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发表时间:
2022
影响因子:
3
通讯作者:
Castro, Ricardo H.R.
中科院分区:
文献类型:
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作者:
Costa, Isabella L.M.;Miagava, Joice;Castro, Ricardo H.R.
Magnesium aluminate nanoceramics show superior hardness due to an extension of the Hall-Petch relationship down to grain sizes below 10 nm. However, the manufacturing of nanoceramics with such exceedingly small grains constitutes a significant challenge. This work proposes sodium as an effective dopant to reduce the processing requirements to achieve full densification with inhibited coarsening. Using Spark Plasma Sintering, we produced fully dense transparent Na-doped MgAl2O4under 400 MPa at 1000 °C with grain sizes below 15 nm. Na-doped samples achieved indentation fracture toughness (K1C) as high as 5.23 MPa/m1/2, surpassing values characteristic of undoped MgAl2O4with a similar grain size, 3.57 MPa/m1/2. The role of Na+as a sintering aid is briefly discussed.
影响因子:
3.9
作者:
Luis E. Sotelo Martin;R. Castro
通讯作者:
R. Castro
影响因子:
5.7
作者:
A. Talimian;H. El;M. Michalková;D. Galusek
通讯作者:
D. Galusek
DOI:
--
发表时间:
2020
期刊:
影响因子:
--
作者:
A. Sheinerman;R. Castro;M. Gutkin
通讯作者:
M. Gutkin