摘要
采用硫酸铝铵热分解方法制备出颗粒细小（-100nm）、粒径分布范围窄、团聚程度轻、性能良好的α-Al2O3纳米粉体，并研究了氧化铝陶瓷刀具材料的制备及力学性能．研究表明，以氧化镁和氧化钇作添加剂，α-Al2O3纳米在1550℃真空烧结2h，可获得相对密度达98．7％的氧化铝陶瓷．样品的维氏硬度为17．0GPa，洛氏硬度HRA为93，抗折强度404MPa，断裂韧性5．7MiCa·m^1/2，达到了高性能氧化铝陶瓷刀具的性能要求．
In this work, alumina cutting tool materials were fabricated using synthesized nanopowder and their mechanical properties were reported. Alumina ceramics with 98.7% relative density were obtained by vacuum sintering at 1 550 ℃ for 2 h and with magnesia and yttria as sintering dopants. The fabricated ceramics showed a Vicker＇s hardness of 17.0 GPa, a three-point-bending-strength of 404 MPa, and a facture toughness of 5.7 MPa m^1/2, indicative of their possible application in ceramic cutting tools.
出处
《材料与冶金学报》
CAS
2008年第3期174-176,181,共4页
Journal of Materials and Metallurgy
关键词
Α-AL2O3
超微粉
氧化铝陶瓷
刀具
ultraline α-Al2O3 powder
alumina ceramic
ceramic cutting tool
