摘要
在块体玻璃形成合金Mg65Cu20Zn5Y10中添加10％(体积分数)的SiC或15％的TiB2陶瓷颗粒,经铜模浇铸形成块体金属玻璃复合材料.这些第二相颗粒的引入对基体合金的玻璃形成能力未产生明显的不良影响.陶瓷第二相颗粒弥散分布于金属玻璃基体上.复合材料的轴向压缩断裂强度达到1 GPa,为Mg65Cu20Zn5Y10块体金属玻璃的1.2倍. Mg65Cu20Zn5Y10块体金属玻璃的断裂发生于弹性形变阶段,断裂前几乎观察不到塑性形变.与之相对照,含有TiB2颗粒的复合材料断裂前可表现出约0.9％的塑性应变.
Ceramic particles of SiC (10%) or TiB2 (15%) (volume fraction) were added in the Mg65Cu20Zn5Y10 bulk metallic glass forming alloy to form the bulk metallic glass composites using copper mold casting. The introduced particles have no adverse effect on the glass forming ability of the matrix alloy. The second phase ceramic particles uniformly disperse in the glass matrix. Uniaxial compressive strength of the composites reached about 1 GPa, a factor of 1.2 higher than the Mg65Cu20Zn5Y10 monolithic glass. The failure for the Mg65Cu20Zn5Y10 monolithic glass occurs at a stage of elastic strain without any visible plastic strain before the fracture. In contrast, a plastic strain to failure about 0.9% was obtained for the TiB2 particulate reinforced composite.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第7期726-730,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金项目50171069和50021101资助
