Ti基非晶及准纳米晶材料制备技术研究
Study on Preparation of Ti-based Amorphous and Quasi Nano-crystalline Material
项宏福, 王冀恒, 李 惠
点击：3178次 下载：0次
作者单位：江苏科技大学 材料科学与工程学院, 江苏 镇江 210023
中文关键字：Ti基非晶； 准纳米晶； 铜模吸铸； 热处理
英文关键字：Ti-based amorphous; quasi nano-crystalline; copper mould suction casting; heat treatment
中文摘要：用Al、B取代Ti50Ni15Cu25Sn3Be7中有毒的Be元素， 采用真空甩带及铜模吸铸法制备名义成分为Ti50Ni15Cu25 -
Sn3Al6.9B0.1的非晶合金。对制得的合金经热处理制备准纳米晶体。采用SEM观察组织及晶粒大小。XRD分析结果表明，铜模吸铸法所制得的合金为晶态加少量非晶。DTA分析表明，合金存在三个相变转变点，转变温度分别为Te1=350 ℃、Te2=430 ℃和Te3=510 ℃。合金经800 ℃油淬10 min、350 ℃回火12 h后晶粒细化，晶粒尺寸在1μm以下，其中析出相的晶粒尺寸已是准纳米级或纳米级尺度。回火24 h后晶粒明显长大，晶粒平均尺寸在10 μm左右。
英文摘要：Be element in Ti50Ni15Cu25Sn3Be7 was replaced with Al and B to prepare Ti50Ni15Cu25Sn3Al6.9B0.1 amorphous alloy by melt-spining, copper suction casting, and then to prepare quasi nano-crystal with the amorphous alloy by heat treatment. SEM was used to observe microstructure and grain size. The XRD analysis shows that the sample prepared by copper suction casting includes crystal and little amorphous. The DTA analysis shows that there are three phase transition points, the transition temperature is that Te1=350 ℃, Te2=430 ℃, Te3=510 ℃. The average grain size of the alloy reduces to below 1 μm after oil quenching at 800℃×10 min and tempering at 350 ℃×12 h, while the grain growth is observed after tempering at 350 ℃×24 h, the average grain size is about 10 μm.