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按照理論計算,金属的强度应該比它实际上的强度高100—1000倍。1952年,有人观察到在特种条件下所生长出来的金属細絲,当直径小到約1微米时,强度差不多接近理論值。不过随后的試驗又指出,这种金属細絲(叫做金属鬍鬚)只有当直径极細的时候才具有高强度,当直径增加到10—20微米时,它的强度便跟实际的金属差不多。因而,要判定能否应用生长金属鬍鬚的条件来生出实际有用的大块金属材料,必須进一步研究金属鬍鬚具有高强度的原因,以及金属鬍鬚强度的尺寸效应的确切情况。金屬鬍鬚的生长为了上述目的,我們就金属鬍鬚的生长和强度进
According to theoretical calculations, the strength of the metal should be 100-1000 times higher than its actual strength. In 1952, it was observed that metal filaments grown under special conditions had strengths approaching the theoretical value when the diameter was as small as about 1 micron. However, later experiments pointed out that the metal filaments (called metal beards) have high strength only when the diameter is very thin, and when the diameter is increased to 10-20 microns, the strength is as good as the actual metal. Therefore, to determine whether the conditions for growth of metal beards can be used to produce practical useful bulk metal materials, further studies must be made of the reasons for the high strength of metal beards and the exact size effect of metal beard strength. Growth of Metal Beards For these purposes, we are concerned with the growth and strength of metal beards