Nd12Fe77Co5B6快淬晶化薄带中的各向异性

本文对成分为Nd_(12)Fe_(77)Co_5B_6的合金进行快淬后晶化处理,得到的薄片和磁粉用振动样品磁强计（VSM）和X射线衍射仪（XRD）进行性能和结构分析,发现在晶化处理后的薄片中出现明显的磁各向异性。其方向为Nd2Fe(14)B晶体的易磁化轴-c轴方向,这种各向异性有利于获得高性能的粘结快淬NdFeB磁体．     

Cu-P中间合金的快速凝固处理对Al-Si合金耐磨性的影响

研究了Cu-P中间合金的快速凝固处理对Al-Si合金耐磨性的影响.TEM分析表明:在冷却速度为105～106℃/s时,Cu-P中间合金薄带的组织由纳米晶和少量的非晶组织组成,而且Cu-P中间合金中的Cu3P的晶粒尺寸由5～40 μm下降到30～50 nm.结果表明,由于强度和硬度的提高,用薄带状中间合金改性处理的Al-Si合金的耐磨性要高于用块状中间合金改性处理的Al-Si合金:磨损率由0.86％下降到0.39％.因此,用熔体快淬Cu-P中间合金进行改性处理是提高Al-Si合金的耐磨性的有效办法.     

Preparation of nanocrystal modificator and its modification mechanism

In order to increase the modifying effect, the Cu-P master alloy was rapidly solidified with melt-spin method, and the nano-sized ribbon was gained at 10^5-10^6 ℃/s. Subsequently, ZL109 alloy was modified by nanocrystal and massive Cu-P master alloy, respectively, with molten metal casting method. The results show that the microscopic structure of ZL109 alloy modified by nanocrystal Cu-P master alloy is better than that modified by massive Cu-P master alloy, the original crystal silicon and eutectic silicon are refined more effectively and the mechanical properties are increased evidently： the tensile-strength is increased by 25%, the elongation is increased by 32.26% and the hardness is increased by 17.2%. Therefore, the melt-spin treatment is a feasible method to improve the modifying effect of Cu-P master alloy.     

晶化热处理条件对Nd2(FeCo)14B/α-Fe纳米复合材料磁性能的影响

用熔体快淬和晶化处理的方法制备了Nd2(FeCo)14B／α-Fe纳米复合材料。研究了晶化热处理温度和时间对材料磁性能的影响。结果表明Nd2Fe35.5Co2B4.5纳米复合材料的磁性能随热处理条件而变化．较高温度短时间比较低温度长时间热处理样品的磁性能稍好一些，并对其机理进行了研究。