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通过显微组织观察、烧结折丝及抗氧脆性测试,研究了不同退火温度下,掺杂元素(Ge和Ce)和掺杂量对钽丝微观组织以及烧结折丝、抗氧脆性的影响。研究表明:随着Ge或Ce掺杂量的增加,钽丝的再结晶温度升高,组织晶粒细化,其中掺Ce比掺Ge细化效果更加明显;钽丝烧结折丝次数随着掺Ge或Ce量的增加而递增;在同样条件下,随着钽粉氧含量的增加,钽丝抗氧脆性变差。掺Ge和Ce的钽丝比仅掺Ge的钽丝抗氧脆性要好,而在钽粉氧含量(≤1500(10-6,质量分数))不很高时,掺Ge钽丝又要比纯钽丝的抗氧脆性要好。
The effects of doping elements (Ge and Ce) and doping amount on the microstructure, sintering and folding resistance and anti-oxidation brittleness of tantalum wire were studied by microstructure observation, sintering folding and anti-oxidation brittleness test. The results show that with the increase of Ge or Ce doping amount, the recrystallization temperature of the tantalum wire increases and the grain refinement of the microstructure becomes more obvious. The effect of Ce doping is more obvious than that of Ge doping. Ge or Ce content increases with increasing; under the same conditions, with the increase of tantalum powder oxygen content, tantalum wire resistance to oxidation brittleness worse. The tantalum wire doped with Ge and Ce is better than the Ge-doped tantalum wire in resistance to oxygen embrittlement only when the tantalum powder oxygen content (≤1500 (10-6, mass fraction)) is not very high, Oxygen resistance of tantalum wire is better.