| Autor: |
CHEN Zheng, YANG Jun-jun, ZHANG Lin, QU Xuan-hui, QIN Ming-li |
| Jazyk: |
čínština |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Fenmo yejin jishu, Vol 39, Iss 5, Pp 387-393 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1001-3784 |
| DOI: |
10.19591/j.cnki.cn11-1974/tf.2021030005 |
| Popis: |
The La2O3-doped W nanopowders were prepared by the solution combustion synthesis method. The densification behavior of the La2O3-doped W nanopowders and the effect of La2O3 on the densification of the W nanopowders were analysed. Meanwhile, the microstructure, thermal conductivity, and microhardness of the sintered alloys were also studied. The results show that, La2O3 can significantly inhibit the densification rate of W nanopowders. The relative density of the pure W powders sintered at 1350 ℃ can reach 96.2%, while that of the La2O3-doped W nanopowders sintered at 1500 ℃ is only 95.0%. The grain size of the La2O3-doped W alloys sintered at 1500 ℃ is 0.57 μm, which is one order of magnitude smaller than that of the pure W alloys. Therefore, the thermal conductivity of the La2O3-doped W alloys is lower than that of the pure W alloys, but the microhardness is significantly improved. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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