Boride Coatings Structure and Properties, Produced by Atmospheric Electron-Beam Cladding
Structure, microhardness and fracture features of coatings produced by atmospheric electron-beam cladding of amorphous boron were investigated. The coatings were produced by cladding of one, two and three layers of powder. Produced coatings thickness is 550, 750 and 900 μm respectively. The peak level of microhardness is 14000…16000 MPa. By the means of XRD analysis it is stated that the main phases of strengthened layers are FeB and Fe2B borides and eutectic (α-Fe + Fe2B). The coatings after one layer cladding have non-uniform structure with microvolumes having lack of borides. Three-layered coatings are noted for their high brittleness. The best properties are presented by two-layer coatings.
Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li
A. Teplykh et al., "Boride Coatings Structure and Properties, Produced by Atmospheric Electron-Beam Cladding", Advanced Materials Research, Vols. 287-290, pp. 26-31, 2011