作　　者： ; ; ; ; ;

机构地区： 北京科技大学材料科学与工程学院

出　　处： 《北京科技大学学报》 2009年第5期602-607,共6页

摘　　要： 以玻璃包覆FeCoSiB合金微丝为对象,研究了氢氟酸含量和反应温度对包覆层去除过程的影响,以及缓蚀剂对Fe-CoSiB芯丝的保护效果.结果表明:在反应温度为25℃的条件下,当所采用的HF质量分数从10%增加到40%时,玻璃包覆层去除速度从0.005μm.s-1提高至0.076μm.s-1;在HF质量分数为40%的条件下,当反应温度从10℃升高到45℃时,玻璃包覆层去除速度从0.033μm.s-1提高到0.234μm.s-1;反应温度为20～25℃时,用质量分数40%的氢氟酸溶液去除厚度范围为7.5～9.0μm高硼硅玻璃包覆层的最佳时间为150s;硫氰酸钠及硫氰酸钠+乌洛托品作为缓蚀剂均可显著抑制氢氟酸溶液对芯丝的腐蚀,硫氰酸钠+乌洛托品还可有效减少金属吸氢,有利于防止芯丝力学性能的劣化. Taking glass-coated FeCoSiB microwires as the research object, the influences of the concentration of hydrofluoric acid solution （HF） and reaction temperature on the removal speed of glass coatings were investigated, and the protection effects of inhibitors on FeCoSiB cores were analyzed. The results show that with the mass fraction of HF increased from 10% to 40% at 2512, the removal speed of glass coatings is increased from 0. 005 μm·s^- 1 to 0. 076 μm· s^- 1. When the temperature of 40 % HF is raised from 10 ℃ to 45 ℃, the removed speed of glass coatings rises from 0. 033 μm· s^- 1 to 0. 234 μm· s^- 1. At the temperature of 20 ℃ to 25 ℃, the optimal time for removing borosilicate glass coatings of 7.5- 9.0 μm in thickness in 40 % FIF is about 150 s. Sodium thiocyanate and sodium thiocyanate plus urotropine both inhibit remarkably HF from eroding FeCoSiB cores, and the hydrogen absorption of the cores is effectively reduced by sodium thiocyanate plus urotropine, which is advantageous to maintain the mechanical properties of the cores.

关 键 词： 玻璃包覆微丝 化学去除 氢氟酸 缓蚀剂

领　　域： [一般工业技术] [金属学及工艺] [金属学及工艺]