Ag Powders Consolidated by Reciprocating Extrusion (CEC)
Abstract CEC has unique characteristic. These are applicability of very large strain and deformation under high hydrostatic pressure. Due to these abilities of CEC, several unique phenomena have been observed. One of them is the possibility of consolidation of metallic powders in room temperature to the form of bulk material. In the present paper the consolidation of AgSnBi and AgNi to bulk composites was presented. Applying the deformation of ψ=0.42 in the single cycle of CEC, under high hydrostatic pressure, the samples without pores and discontinuities were fabricated. The microstructure observations were performed by optical microscopy (MO), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). They show refinement of microstructure at all levels of observation. The nanometric-size subgrains/grains were found inside consolidated granules. The microhardness level of AgSnBi in average achieved level 110 μHV100, and AgNi of about 90 uHVioo-The AgSnBi samples consolidated by CEC and additional hydrostatically extruded to wires with 3 mm in diameter average showed 500 MPa yield point.
Maria Richert Jan Richert Agnieszka Hotlos Pawet PaJka Wadaw Pachla Matgorzata Perek
AGH,University of Science & Technology,al.Mickiewicza 30,30-059 Krak6w,Poland Institute of High Pressure Physics,ul.Sokotowska 29/37,01-142 Warszawa,Poland
国际会议
5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)
南京
英文
145-150
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）