Karlík M, Bigot A, Jouffrey B, Auger P, Belliot S
Péchiney, Centre de Recherche de Voreppe, 725 Rue Aristide Berges, 38340 Voreppe, France.
Ultramicroscopy. 2004 Jan;98(2-4):219-30. doi: 10.1016/j.ultramic.2003.08.015.
An investigation of Guinier-Preston zones in Al-1.54at% Cu alloy annealed for 30h at 100 degrees C was carried out on the same monocrystal with complementary techniques of high-resolution electron microscopy (HREM) and tomographic atom probe-field ion microscopy (TAP-FIM). HREM results show that majority of GP1 zones are monolayers 1-9nm in size. However, some GP2 zones and particles in an intermediate state of growth between GP1 and GP2 stage were also found. From TAP results it follows that GP1 zones with different Cu concentrations ranging from 40% up to 100% Cu coexist. The residual solid solution is very heterogeneous. In the vicinity of GP particles the Cu content in the matrix falls down to zero, the solid solution in other regions contains from 0.7 to 1at% Cu.
利用高分辨率电子显微镜（HREM）和断层原子探针场离子显微镜（TAP-FIM）等互补技术，在同一单晶体上对在100℃下退火30小时的Al-1.54at% Cu合金中的Guinier-Preston区进行了研究。HREM结果表明，大多数GP1区是尺寸为1-9nm的单层。然而，也发现了一些GP2区以及处于GP1和GP2阶段之间生长中间状态的颗粒。从TAP结果可以看出，不同铜浓度（从40%到100% Cu）的GP1区共存。残余固溶体非常不均匀。在GP颗粒附近，基体中的铜含量降至零，其他区域的固溶体含0.7至1at%的铜。
