【摘要】 超高压固结成形方法是非常有应用前景的大块非晶制备方法之一。利用该技术在金刚石压机上对Al82Ni10Y8雾化合金粉末进行了致密化。通过X射线衍射仪、扫描电镜和透射电镜对粉末及大块合金试样的物相、形貌及微观结构进行了分析,结果表明,所制备的块体材料保持了原始粉末状态的非晶及纳米晶结构。更多还原

【Abstract】 Ultrahigh pressure consolidation is one of the most promising techniques to fabricate bulk alloys. In this work, an Al₈₂Ni₁₀Y₈ alloy was atomized using inert gas closed-couple nozzle atomizer and the as-atomized powders were subsequently densified under ultrahigh pressure generated by hexahedral diamond press. The phase composition, morphology and microstructure of the atomized powder and bulk alloy were analyzed by X-ray diffractometry（XRD）, scanning electron microscopy （SEM） and transmission electron microscopy respectively. The results show the bulk alloy preserves the amorphous and nanocrystalline structure of as-atomized powders.更多还原