采用模压成形工艺制备连续梯度不锈钢多孔材料.试验对所制备的不同厚度连续梯度不锈钢多孔试样的收缩率及微观形貌进行了分析.结果表明:通过烧结试样的几何轮廓证实连续梯度多孔试样烧结后发生变形--相邻梯度层烧结应力的不同造成圆柱状试样烧结后变成圆台状;烧结过程中连续梯度多孔试样相邻梯度层间力的作用能够促进粉末烧结,对试样的烧结收缩产生影响,并且,粉末粒度越小,这种影响越明显;选择合适的级配粉末以及梯度层间合理的粉末体积或质量搭配,通过不同梯度层间烧结应力的相互抑制作用,可以实现同步收缩烧结,有效解决连续梯度不锈钢多孔材料烧结过程中出现的变形、开裂问题.
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