닉켈基 耐熱合金의 一種인 Rene´ 41 合金에 있어서 γ` 析出相의 成長에 對하여 電子顯微鏡的方法으로 調査하였다. 試料를 760℃, 840℃ 및 880℃에서 時效熱處理하여 γ` 粒子의 크기를 測定함으로써 時效時間에 따른 粒子의 成長過程을 調査하였다. 粒子의 成長度 및 分布는 Lifshitz-Wagner의 擴酸支配的 機構理論의 豫想과 一致되는 것을 알 수 있었다. 粒子의 成長에 必要한 活性化에너지를 구하였던 바 65.9 ㎉/㏖이라는 값을 얻었다. 또한 粒子의 形態에 對해서도 檢討하였다.

The kinetics of growth of the gamma prime precipitates in Rene´ 41 have been studied by means of electron microscopy. The coarsening behavior of the gamma prime precipitates was determined as a function of aging time by measuring the particle sizes of samples aged at 760℃, 840℃ and 880℃, respectively. The measured coarsening rates and particle size distributions were in good agreement with the predictions of the Lifshitz-Wagner theory of diffusion controlled coarsening at all aging temperatures examined. The value of the activation energy for the coarsening process was found from the experimental data to be 65.9 ㎉/㏖. Also the merphology of gamma prime precipitates is discussed.