【摘要】 为了降低多孔管高温烧结和长时间烧结对机体造成的有害影响,优化烧结工艺。通过筛选粉末和两段烧结法,与常规工艺相比,将锡青铜表面多孔管的烧结温度,降低100～200℃。新工艺获得的多孔层孔隙度高、当量孔径在30～45μm之间。采用扫描电子显微镜(SEM)对表面多孔管进行检测,结果显示用新工艺烧结的表面多孔层质量好、结合强度高。分析了新工艺降低烧结温度的机理。更多还原

【Abstract】 To reduce the harmful influences on the base material of high-temperature sintering and long-time sintering and optimize the sintering art, the sintering temperature was reduced by 100～200℃ compared with the traditional art good filtering powders and the sintering method of two phases was adopted. The porous metallic layer obtained by the new process has high porosity and its equivalent pore radius is from 30μm to 45μm. After inspected by SEM, the results indicated that the porous surface tubes sintered by the new process had high quality and strong joint strength. Finally, analysis was made on the mechanism of the new process of reducing the sintering temperature.更多还原