Ostwald ripening

Japanese: オストワルド成長 - おすとわるどせいちょう
Ostwald ripening

...In the later stages of aging, the process in which larger precipitates grow by eliminating fine precipitates is often observed. This process is called Ostwald ripening, and the driving force for this reaction is said to be the reduction in interfacial energy.
[Excessive quenching voids]
When an alloy is quenched, not only the solute atoms but also the vacancies (also called holes, the concentration of which increases with increasing temperature) become supersaturated.

*Some of the terminology explanations that mention "Ostwald ripening" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…時効の後期では微細な析出相を消滅させることにより,より大きな析出相が成長するという過程をとることが多い。これはオストワルド成長と呼ばれ,この反応の駆動力は界面エネルギーの減少にあるとされる。
[焼入過剰空孔]
 合金を焼き入れると,溶質原子だけでなく空格子点(空孔ともいい,高温になるほど濃度は大きくなる)も過飽和となる。…

※「オストワルド成長」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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