Abstract—

We have studied the self-propagating high-temperature synthesis (SHS) process due to the combustion of a WO₃ + ZrO₂ + TiO₂ + Mg multicomponent mixture. The ratio of the oxide phases and excess Mg content have been shown to have a significant effect on the phase composition of the synthesized material. Increasing the WO₃ content of the starting mixture from 7.4 to 59.6% raises the adiabatic combustion temperature from 1560 to 3099 K and reduces the percentage of Zr and Ti metals in the synthesis product, which pass into the W〈Zr,Ti〉 solid solution. We have optimized the composition of the starting mixture, 50.6% WO₃ + 6.9% ZrO₂ + 4.5% TiO₂ + 38% Mg, so that its combustion yields a semifinished product consisting of W〈Zr,Ti〉 alloy, MgO, and Mg. After acid leaching, we have obtained a single-phase W〈Zr,Ti〉 substitutional solid solution. Chemical analysis and X-ray diffraction data demonstrate that the alloy thus prepared is similar in composition to W_0.66Zr_0.17Ti_0.17.

中文翻译：

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在WO 3 -ZrO 2 -TiO 2 -Mg体系中燃烧合成W-Zr-Ti合金

摘要—

由于WO ₃ + ZrO ₂ + TiO ₂ + Mg多组分混合物的燃烧，我们研究了自蔓延高温合成（SHS）工艺。已经表明氧化物相的比例和过量的Mg含量对合成材料的相组成具有显着影响。将起始混合物的WO ₃含量从7.4增加到59.6％，可将绝热燃烧温度从1560增加到3099 K，并降低合成产物中Zr和Ti金属的百分比，这些金属进入W 〈Zr，Ti〉固溶体中。我们优化了起始混合物的成分，即50.6％WO ₃ + 6.9％ZrO ₂ + 4.5％TiO ₂+ 38％的Mg，因此燃烧产生的半成品由W 〈Zr，Ti〉合金，MgO和Mg组成。酸浸后，我们获得了单相W 〈Zr，Ti〉替代固溶体。化学分析和X射线衍射数据表明，由此制备的合金在组成上与W _0.66 Zr _0.17 Ti _0.17相似。