Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States.
ACS Appl Mater Interfaces. 2013 Sep 11;5(17):8813-9. doi: 10.1021/am402719p. Epub 2013 Aug 29.
Metal-matrix nanocomposites (MMNCs) have great potential for a wide range of applications. To provide high performance, effective nanoparticle (NP) dispersion in the liquid and NP capture within the metal grains during solidification is essential. In this work, we present the novel synthesis and structural characterization of surface-clean titanium diboride (TiB2) NPs with an average particle size of 20 nm, by ultrasonic-assisted reduction of fluorotitanate and fluoroboride salts in molten aluminum. The high-intensity ultrasonic field restricts NP growth. Using a master nanocomposite approach, the as-prepared TiB2 NPs are effectively incorporated into A206 alloys during solidification processing because of their clean surface, showing partial capture and significant grain refinement.
金属基纳米复合材料（MMNCs）具有广泛应用的巨大潜力。为了提供高性能，在凝固过程中有效分散纳米颗粒（NP）在液体中并捕获 NP 进入金属晶粒是至关重要的。在这项工作中，我们通过在熔融铝中超声辅助还原氟钛酸盐和氟硼酸盐盐，提出了新颖的表面清洁钛二硼化物（TiB2）纳米颗粒的合成和结构表征，平均粒径为 20nm。高强度超声场限制了 NP 的生长。通过主纳复合材料的方法，由于其清洁的表面，在凝固过程中，所制备的 TiB2 NPs 有效地被掺入到 A206 合金中，表现出部分捕获和显著的晶粒细化。
