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采用凝胶固化和真空烧结手段制备了多孔钛块体材料,借助扫描电子显微镜、热分析仪和电子万能试验机等分析了不同单体浓度对多孔钛凝胶固化、坯体和烧结体力学性能的影响。结果表明:浆料pH值在7～9范围内分散剂柠檬酸铵的分散作用明显;浆料体系中单体质量分数为20%,引发剂过硫酸铵加入量为6mmol/L,氨水加入量为0.1mL,温度为45℃时,其凝胶固化时间为68min;单体质量分数为15%、20%、25%时,所制备坯体的抗弯强度分别为15.2、20.6、24.1MPa;经1 100℃/2h烧结后,烧结体的开孔孔隙度为39.5%。
Porous titanium block materials were prepared by means of gel curing and vacuum sintering. The mechanical properties of porous titanium gel, mechanical properties of green body and sintered body were analyzed by scanning electron microscopy, thermal analyzer and electronic universal testing machine. Impact. The results showed that the dispersing effect of dispersant ammonium citrate was obvious in the range of pH 7 to pH 9; the content of monomer in slurry system was 20%, the amount of initiator ammonium persulfate was 6mmol / L, Is 0.1mL, the gel curing time is 68min when the temperature is 45 ℃; the flexural strength of the prepared body is 15.2,20.6,24.1MPa when the monomer mass fraction is 15%, 20%, 25% After sintering at 1 100 ° C for 2 hours, the open porosity of the sintered body was 39.5%.