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在金属须的生长过程中有意地搀入杂质,以研究杂质对于金属须的生长方式和强度的影响。把1:5的FeCl_2和CuCl混合起来在氢气中进行还原,得到一根直径13.6微米而拉断强度为262公斤/毫米~2的铜金属须,这远比直径相同的“纯”铜金属须的强度为高。搀钴的铜金属须的强度也大大提高,但是搀银的铜金属须的强度却不发生显著的变化。对于这种金属须作了金相观测,由此推论到金属须的强化主要是由于沉淀硬化或弥散硬化。此外,还根据沿轴线的螺型位错的机构讨论了杂质对于促进金属须生长的效应。 把较高比例(例如1:2)的氯化亚铁搀入氯化亚铜并且在800℃以上的温度在氢气中进行还原,得到了直径达到800微米的混合金属须。这种金属须具有一个心轴,是由一种金属的单晶金属须所构成的,心轴的外面包围着由铜铁紧密搀合所形成的机械混合体。初步的实验指出这种金属须的强度相当高。
In the process of metal whisker growth intentionally doped with impurities to study the growth of metal whiskers and the impact of strength. The 1: 5 FeCl 2 and CuCl are mixed and reduced in hydrogen to give a copper metal whisker with a diameter of 13.6 μm and a tensile strength of 262 kg / mm 2, which is much larger than the “pure” copper metal whiskers of the same diameter The intensity is high. Cobalt-doped copper metal whisker strength is greatly improved, but the strength of silver-doped copper metal whiskers does not change significantly. Metallographic observations of this metal have been made, and it follows that reinforcement of metal whiskers is mainly due to precipitation hardening or dispersion hardening. In addition, the effect of impurities on promoting the growth of metal whiskers is also discussed on the basis of screw dislocation mechanisms along the axis. A higher proportion (eg 1: 2) of ferrous chloride is doped with cuprous chloride and reduced in hydrogen at a temperature above 800 [deg.] C. to give mixed metal whiskers up to 800 [mu] m in diameter. This metal shall have a mandrel made of a single metal whisker of metal, surrounded by a mechanical blend formed by the intimate admixture of copper and iron. Preliminary experiments show that the strength of the metal whiskers is quite high.