| 摘要 |
The shaped part produced by pressing and sintering a pulverulent starting material, comprises a disk-or plate-shaped basic body (1) formed with knobs- and/or ridge-shaped elevations (2) having a height h and with two inclined side flanks, respectively, in cross-section, where the side flanks are extended from an end contour (3) of the elevation over rounded corner (4, 4') with a radius r and/or r' directly or flows over straight sections (5, 5') lying in between into curve-shaped sections having a radius R, R' respectively, where the curve-shaped sections are passed into the surface contour. The shaped part produced by pressing and sintering a pulverulent starting material, comprises a disk-or plate-shaped basic body (1) formed with knobs- and/or ridge-shaped elevations (2) having a height h and with two inclined side flanks, respectively, in cross-section, where the side flanks are extended from an end contour (3) of the elevation over rounded corner (4, 4') with a radius r and/or r' directly or flows over straight sections (5, 5') lying in between into curve-shaped sections having a radius R, R~ respectively, where the curve-shaped sections are passed into the surface contour of the basic body. The straight sections and/or the rounded corner is provided in a direct transition into the curve-shaped sections, where the tangent comprises an angle of inclination alpha and alpha ', to the surface contour in an area of 95-110[deg] C at the point of the transition. The radius R and R' lies in the area of 0.3-1 mm and the height is dimensioned so that ratio R: h and/or R': h lies in the area of 0.7-1. The shaped part of the interconnector or the end plate is a fuel cell stack. The pulverulent starting material is an alloy with chromium content of 20 wt.%, where the pulverulent starting material consists of chromium (95 wt.%) and yttrium (5 wt.%) of a prealloy of iron with 0.5-0.8 wt.%. |
