Influence of compression on thermal and corrosion behavior of Fe_(78)Si_9B_(13) glassy alloy

压力对非晶Fe_(78)Si_9B_(13)的热性能和耐腐蚀性能的影响(英文)

The Fe78Si9B13 glassy ribbons were compressed at room temperature with different pressures. The thermal and corrosion behaviors were investigated using various experimental techniques. The X-ray diffraction （XRD） and dilatometer （DIL） results show that the Fe78Si9B13 ribbons are in full amorphous state after pressing and the amount of free volume increases monotonically with increasing pressure. The corrosion resistance of the glassy alloys in various solutions decreases after compression at 10 MPa, but increases after compression at 20 MPa. The non-monotonic change of corrosion resistance is consistent with the result of electrical resistivity, which can be explained by the combining action of free volume that is introduced by the compression and the segregation of Si atoms in the samples.

室温下,对非晶Fe78Si9B13条带进行压力处理,通过不同的实验手段检测其热性能和耐腐蚀性能。XRD和热膨胀数据显示经过压力处理后Fe78Si9B13条带仍保持非晶状态,并且其内部自由体积数量随着压力的增加而单调增加。在10MPa的压力条件下非晶条带在不同溶液中的耐腐蚀性能减弱,在20MPa的压力条件下耐蚀性能增强,这种非线性变化与电阻率变化结果一致。可以通过由于压力引入样品中而导致自由体积的数量和硅原子的偏析来解释这一非单调变化。