The body-centred-cubic to face-centred-cubic phase transformation in thorium and some thorium-rich alloys
The body-centred-cubic to face-centred-cubic phase transformation in thorium and some thorium-rich alloys
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DOI：
10.1016/0022-3115(64)90102-3
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发表时间：
1964-05
影响因子：
3.1
通讯作者：
G. Bannister;J. R. Thomson
中科院分区：
文献类型：
--
作者：
G. Bannister;J. R. Thomson
用差热分析方法研究了Th和几种富Th合金的fco(α)→bcc(β))相变。铟和硅对相变温度影响不大，铝、铈、氦、铀和锆使相变温度降低。在Th-Ce合金上的实验结果与约30at%Ce和1300℃时的反向包晶反应相一致，并提出了Th-Ce相图中富Th部分的修正形式。热分析、热处理和淬火结果表明，Th-U合金的Th/Th3Si2共晶温度为1439±8°C，铀使共析温度降低到1343±17℃，在此温度下铀在α-Th中的溶解度约为2.7at%。
The fco (α)→ bcc (β) phase transformation of thorium and several thorium-rich alloys has been studied by differential thermal analysis. Indium and silicon had no significant effect on the transformation temperature while aluminium, cerium, hafnium, uranium and zirconium lowered it. The results on thorium-cerium alloys are consistent with an inverse peritectic reaction at about 30 at% cerium and 1300° C and a revised form of the thorium-rich part of the thorium-cerium phase diagram is proposed. Thermal analysis and annealing and quenching results place the thorium/Th 3 Si 2 eutectic temperature at 1439±8° C. The results on Th-U alloys indicate that uranium lowers the transformation temperature to a eutectoid at 1343±17° C and that the solubility of uranium in α-thorium is approximately 2.7 at% at this temperature.