帯域熔融精製した錫及び鉛の下部組織の顕微鏡観察

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  • Microscopic Observation of the Substructure in Zone-Refined Lead and Tin
  • タイイキヨウユウセイセイ シタ スズ オヨビ ナマリ ノ カブ ソシキ ノ ケンビキョウ カンサツ

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The following findings are obtained by microscopic observation of the substructure in the zone-refined lead and tin. (1) The corrugation structure is observed only at the impure tail part of zone-refined bar. Coming nearer to the tail part, corresponding to the increase of impurity content, corrugation once appears and then disappears, this is repeated two or three times, and thereafter continuous corrugation takes place. (2) The effect of impurity concentration on the width of corrugation is rather complicated, sometimes widening and sometimes narrowing it down. As a general tendency, with the increase of impurity content the width of corrugation increases and after passing over a maximum value it continues to decrease till the appearance of dendritic growth. (3) Striation is observed in all parts of the bar, and it is not sensitive to the impurity content. (4) The striation boundaries are linear arrays of etch pits, possibly due to edge dislocations. (5) Banding does not coexist with corrugation structure and is observed only in portions of higher purity.

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  • 日本金属学会誌

    日本金属学会誌 24 (5), 316-320, 1960

    公益社団法人 日本金属学会

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