Preparation of pure Ni metal material based on Nocadia shape

Abstract

A new type of Ni metal material was prepared by bioforming machining technology based on the rod shape of Nocadia, one kind of bacteria. The material was studied by microbiological method, scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and vibrant sample magnetometer (VSM) technology. It was found that the amount of Ni crystalline increased with processing time. The Nocadia maintained the original rod shape after Ni deposition. The thickness of Ni coating was about 100 nm. The volume of cytoplasm remained 5%–10% for the high temperature during the processing. The material prepared could be considered hollow compared with the original Nocadia. The new type Ni hollow material with nano-grains was prepared. The material exhibited a ferromagnetic behavior with saturation magnetization (Ms), remanent magnetization (Mr) and coercivity (Hc) values of 46.67 emu/g, 18.43 emu/g and 230.9 Oe, respectively. Compared with those of the bulk Ni, Ms was decreased a little while Hc was enhanced greatly.