Preparation and properties of Ti50Cu28 Ni15Sn7 bulk metallic glass by vacuum hot pressing

H. M. Lin, C. K. Lin, R. R. Jeng, H. Y. Bor, P. Y. Lee

研究成果: 雜誌貢獻文章同行評審


Amorphous Ti50Cu28Ni15Sn7 alloy powders were synthesized by a mechanical alloying (MA) technique. Differential scanning calorimetry (DSC) results showed that, after 7 hours of exposure to the milling process, amorphous Ti50 Cu28Ni15Sn7 alloy powders exhibit a wide supercooled liquid region of 61 K. Consolidation of amorphous powders were performed at a temperature slightly higher than the glass transition temperature under a pressure of ∼1.2 GPa, and bulk metallic glass (BMG) discs can be prepared successfully. However, we noticed partial crystallization during the hot pressing process and were not able to achieve full densification of BMG. The Vickers microhardness of Ti50Cu28Ni15Sn7 BMG was 634 kg/mm2, and the trace of the indentation revealed that pre-existing particle boundaries or interfaces between nanocrystals and amorphous matrix may serve as the crack initiation sites. Thus, typical brittle failure of Ti50Cu28Ni15 Sn7 BMG was observed and resulted in relatively low fracture stress compared to that estimated by the microhardness.
頁(從 - 到)1857-1861
期刊Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
出版狀態已發佈 - 8月 2008

ASJC Scopus subject areas

  • 材料科學(全部)
  • 金屬和合金


深入研究「Preparation and properties of Ti50Cu28 Ni15Sn7 bulk metallic glass by vacuum hot pressing」主題。共同形成了獨特的指紋。