Park Byung Joo, Chang Hye Jung, Kim Do Hyang, Kim Won Tae, Chattopadhyay Kamanio, Abinandanan T A, Bhattacharyya Saswata
Department of Metallurgical Engineering, Center for Noncrystalline Materials, Yonsei University, Seoul 120-749, Korea.
Phys Rev Lett. 2006 Jun 23;96(24):245503. doi: 10.1103/PhysRevLett.96.245503. Epub 2006 Jun 22.
Phase separating systems present a unique opportunity for designing composites with hierarchical microstructure at different length scales. We report here our success in synthesizing phase separating metallic glasses exhibiting the entire spectrum of microstructural possibilities expected from a phase separating system. In particular, we report novel core shell and hierarchical structures of spherical glassy droplets, resulting from critical wetting behavior and limited diffusion. We also report synthesis of a bulk phase separating glass in a metallic glass system. The combination of unique core shell and hierarchical structures in metallic glass systems opens a new avenue for the microstructure design of metallic glasses.
相分离系统为设计具有不同长度尺度分层微观结构的复合材料提供了独特的机会。我们在此报告了成功合成相分离金属玻璃的情况，这些金属玻璃展现出了相分离系统预期的全范围微观结构可能性。特别是，我们报告了由临界润湿行为和有限扩散导致的球形玻璃液滴的新型核壳结构和分层结构。我们还报告了在金属玻璃系统中合成块状相分离玻璃的情况。金属玻璃系统中独特的核壳结构和分层结构的结合为金属玻璃的微观结构设计开辟了一条新途径。
