(1. 南昌大學(xué) 材料科學(xué)與工程學(xué)院，南昌 330031；2. 南昌硬質(zhì)合金有限責(zé)任公司，南昌 330013；3. 中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083)
摘 要: 研究在常規(guī)退火前的高溫短時(shí)間預(yù)退火對(duì)非晶Fe86Zr7B6Cu1合金晶化過(guò)程的影響，通過(guò)分析溫度對(duì)形核速率和晶粒長(zhǎng)大速率的影響規(guī)律，討論預(yù)退火對(duì)非晶Fe86Zr7B6Cu1合金晶化過(guò)程的影響機(jī)制。結(jié)果表明，合適的預(yù)退火引起納米晶Fe86Zr7B6Cu1合金中結(jié)晶α-Fe相的晶粒尺寸的減小和體積分?jǐn)?shù)的增加。非晶Fe86Zr7B6Cu1合金經(jīng)600 ℃退火1 h后的結(jié)晶α-Fe相的晶粒尺寸和體積分?jǐn)?shù)分別為13.2 nm和65.2%，而在750 ℃保溫2 min再在600 ℃退火1 h后的結(jié)晶α-Fe相的晶粒尺寸和體積分?jǐn)?shù)分別為9.5 nm和72.4%。 在750 ℃保溫2 min再在600 ℃退火1 h后的試樣比常規(guī)退火得到的試樣具有更為優(yōu)良的軟磁性能。
關(guān)鍵字: Fe86Zr7B6Cu1合金；納米材料；磁性材料；顯微組織；非晶相；結(jié)晶
（1. School of Materials Science and Engineering, Nanchang University,Nanchang 330031, China;2. Nanchang Cemented Carbide Limited Liability Company,Nanchang 330013, China;3. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:The effect of pre-annealing at higher temperature for short duration before conventional annealing at 600 ℃ for 1 h on the crystallization process of amorphous Fe86Zr7B6Cu1 alloy was studied. The affecting mechanism of pre-annealing on the crystallization process of amorphous Fe86Zr7B6Cu1 alloy is discussed by analyzing the temperature dependence of the nucleation rate and the grain growth rate. It is shown that proper pre-annealing leads to the decrease of the grain size and the increase of the volume fraction of crystalline α-Fe in nanocrystalline Fe86Zr7B6Cu1 alloy. BCC α-Fe with grain size of 9.5 nm and volume fraction of 72.4% is formed in ribbon after it has been pre-annealed at 750 ℃ for 2 min followed by conventional annealing at 600 ℃ for 1 h. The grain size and volume fraction of crystalline α-Fe in ribbon annealed at 600 ℃ for 1 h are 13.2 nm and 65.2%，respectively. Complex permeability spectra show that pre-annealing at 750 ℃ for 2 min before conventional annealing at 600 ℃ for 1 h results in a distinct improvement of soft magnetic properties.
Key words: Fe86Zr7B6Cu1 alloy; nanomaterial; magnetic material; microstructures; amorphous phase; crystallization
