New Ce-Cu-Al-Zn Bulk Metallic Glasses with High Oxidation Resistance
| Autor: | Akihisa Inoue, Zan Bian |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Materials science
Amorphous metal Mechanical Engineering Metallurgy Alloy Analytical chemistry engineering.material Condensed Matter Physics Crystallization temperature Zn element Mechanics of Materials engineering General Materials Science Thermal stability Glass transition Supercooling Oxidation resistance |
| Zdroj: | MATERIALS TRANSACTIONS. 47:2599-2602 |
| ISSN: | 1347-5320 1345-9678 |
| Popis: | We reported the effect of Zn addition on the glass formation ability (GFA), thermal stability, melting behavior and oxidation behavior of Ce-based bulk metallic glasses (BMGs). The Ce-Cu-Al alloys with Zn addition also have high glass formation ability (GFA) and large supercooled liquid regions (ΔT x , ΔT x = T x - T g , T x is the onset crystallization temperature and Tg is the glass transition temperature). The T g , T x and ΔT x are, respectively, 368, 437 and 69 K for the (Ceo 0.72 Cu 0.28 ) 87.5 Al 10 Zn 2.5 alloy, and 394, 467 and 73 K for the (Ce 0.72 Cu 0.28 ) 82.5 -Al 10 Zn 7.5 alloy. The ΔT x of the (Ce 0.72 Cu 0.28 ) 100-x Al 10 Zn x alloys was above 70K and the BMGs with diameters up to ∼6 mm could be produced successfully. The critical diameters and ΔT x of the alloys increase with increasing Zn content, and have maximum values of 6 mm and 73 K, respectively, at 7.5 at% Zn, and then decreases in the higher Zn content range. The melting behavior shows that the addition of Zn element causes the significant increase of both T m and T l . The investigation of oxidation behavior shows that the addition of Zn element is effective for the enhancement of the oxidation resistance. |
| Databáze: | OpenAIRE |
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