摘要
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
The formation and properties of Zr-based bulk metallic glasses (BMGs) and nanocrystalline phase included BMGs with excellent glass forming ability as well as unique properties are reported in the paper. The results show that (1-2)%(atomic fraction) carbon addition facilitates the extension of supercooled liquid region for the Zr/Ti-based BMGs. More carbon addition (3%--8% atomic fraction) will lead to the formation of nanocrystalline ZrC. Iron addition up to 8% does not modify the glass forming ability obviously, more addition (10%-15%) will bring out the formation of Zr2Fe nanocrystalline phase. The Nb containing Zr-based BMGs exhibit higher thermal stability than that of the Ti containing Zr-based BMGs. It was found that 8% iron addition greatly improves the glass forming ability of Zr/Nb-based BMG. Yttrium addition also ameliorates glass forming and properties of Zr-based BMGs.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第11期1153-1156,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金!资助项目 59871059
关键词
块体金属玻璃
ZR基合金
热稳定性
超声测量
bulk metallic glass, zirconium base alloy, ultrasonic, thermal stability
