【摘要】 添加微量稀土元素使纯Pt的再结晶温度提高200～300℃,硬度和抗拉强度增高2～3倍。含重稀土铂合金的强度一般高于轻稀土铂合金。Eu和Yb与Pt组成的合金的强度很高。微量稀土元素使铂的电阻率增加很少,当含量增加到1wt%时,电阻率明显升高,而硬度和抗拉强度反而降低。更多还原

【Abstract】 The effects of rare-earths on the strength and resistivity of platinum at room temperature are investigated in present paper. The addition of trace rare-earths would increase the rccrystallization temperature of platinum by 200～300℃, and the hardness and tentile strength by 2～6 times. Generally, the strength of Pt-alloys containing heavy. rare-earths arc higher than that of light rare-earths. Platinum alloys, specially the addition of Eu and Yb to Pt alloys, which have larger atomic radius, can considerably elevate their strengths. The resistivity of platinum does not increase obviously when rare-earths are added into platinum, but if the amout of rare-earths added are up to 1(wt)%, the resistivity would be elevated obviously, and contrarily the hardness and tensile strength are decreased更多还原