冷間加工이 지르코늄의 酸化에 미치는 影響을 究明하였다. 1/4"지름의 지르코늄棒(99.9%)을 두께 2.0 ㎜의 圓板으로 만들어 2×10^(-4)mmHg의 眞空에서 800℃ 1時間 燒鈍한후 0%에서 30%까지 10%의 增加率로써 單一軸方向으로 壓縮하였다. 測定된 지르코늄의 酸化는 時間의 立方根의 極數로 表示할 수 있으며 加工度에는 反比例하였다. 酸化에 必要한 活性化에너지는 425℃∼490℃에서 36.6 ㎉/mole 490℃∼550℃에서 45.7 ㎉/mole이었으며 Arrhenius rate equation의 常數項만이 加工度(D%)인 影響을 받어 A_d=A_o(1-0.008D)로 表示할 수 있었다. 酸化率常數는 加工度의 極數로 다음과 같이 求하여졌다. 425℃∼490℃ K_c=1.85×10^(-5)(1-0.008D) exp (-36.600/RT) 490℃∼550℃ K_c=6.95×10^(-3)(1-0.008D) exp (-45.700/RT)

The cold work dependence of the change of oxidation rate was studied. Specimens cut into 2.0 ㎜ thickness disk from zirconium rod (99.9%) were annealed in the vaccum tube furnace at 800℃ for 1 hour, and than uniaxially cold compressed from 0 to 30% with 10% increment. The oxidation rate was decreased with increase in the degree of cold work. The activation energy was calculated to be 36.6 and 45.7 ㎉/mole for low temperature (425-490℃) and high temperature region (490℃-550℃), respectively. The constant of Arrhenius rate equation was dependent variable of the degree of cold work (D%) and best expressed by the following from A_d=A_o (1-0.008D). The cold work dependent rate can be expressed as follows: 425℃-490℃ K_c=1.85×10^(-5)(1-0.008D) exp (-36.000/RT) 490℃-550℃ K_c=6.95×10^(-3)(1-0.008D) exp (-45.700/RT)