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研究了一系列具有很强非晶形成能力(GFA)和优异性能的块体金属玻璃(BMG)及含有纳米晶的 BMG的制备过程,结果表明,对掺碳的 Zr/Ti基 BMG,当碳含量(原子分数,%,下同)在 1—2时,合金具有很宽的过冷液相区(SLR,晶化开始温度 Tx和玻璃转变温度 Tg之间的温区)和较高的约化玻璃转变温度 Trg(Trg- Tg/Tm);当碳含量增至 3—8时,合金为含有纳米晶 ZrC的 BMG基复合材料加 Fe的 Zr/Ti基 BMG的 Fe含量最高可以达到 8,当 Fe含量为 10—15时得到的是含有纳米晶 Zr2Fe的 BMG材料. Zr/Nb基 BMG的 GFA和 Zr/Ti基 BMG的 GFA相当,但是 Tg和 Tx更高,因此具有更好的热稳定性.含 Fe的 Zr/Nb基 BMG在 Fe含量为 8时具有最高的 GFA. Zr/Ti基 BMG中掺入 Y,可使其 Young’s模量、切变模量高于其他 Zr基 BMG的相应模量
A series of preparation processes of bulk metallic glass (BMG) and nanocrystalline BMG with strong amorphous formation ability (GFA) and excellent properties were studied. The results show that for carbon-doped Zr / Ti-based BMG, Content (atomic fraction,%, the same below) at 1-2, the alloy has a very wide supercooled liquid region (SLR, crystallization start temperature Tx and the glass transition temperature Tg between) and higher about When the carbon content is increased from 3 to 8, the content of Fe in the Zr / Ti-based BMG with BMG-based composite containing nanocrystalline ZrC and Fe is up to 8, When the Fe content is 10-15, a BMG material containing nanocrystalline Zr2Fe is obtained. The GFA of the Zr / Nb-based BMG is comparable to the GFA of the Zr / Ti-based BMG, but has a higher Tg and Tx and hence better thermal stability. The Fe-containing Zr / Nb-based BMG has the highest GFA at a Fe content of 8. Incorporation of Y into the Zr / Ti-based BMG allows its Young’s modulus, which is higher than that of other Zr-based BMGs