Development of Textured Microstructures in Ceramics with Large Thermal Expansion Anisotropy
Development of Textured Microstructures in Ceramics with Large Thermal Expansion Anisotropy
复制标题
大热膨胀各向异性陶瓷中织构微结构的发展
DOI：
10.1111/j.1151-2916.1994.tb07014.x
复制
发表时间：
1994
影响因子：
3.9
通讯作者：
E. Fuller
中科院分区：
文献类型：
--
作者：
S. Paulik;K. Faber;E. Fuller
Fe_2TiO_5在热膨胀和顺磁化率方面表现出高度的各向异性。顺磁化率的各向异性允许在样品制造过程中使用磁辅助晶粒排列来产生纹理微结构。所得固态烧结排列样品的 b 轴取向系数为 3.33（排列粉末环氧树脂悬浮液的 b 轴取向系数为 6.60），其中取向系数 1 表示随机取向的样品。这种纹理减少了对照样品的大热膨胀各向异性产生的残余应力，如减少的微裂纹和对齐的微观结构的形态纹理所证明的。
Fe_2TiO_5 exhibits a high degree of anisotropy in both thermal expansion and paramagnetic susceptibility. Anisotropy in paramagnetic susceptibility allows textured microstructures to be produced using magnetically-assisted grain alignment during sample fabrication. The resulting solid-state sintered aligned samples had a b-axis orientation coefficient of 3.33 (vs 6.60 for an aligned powder–epoxy suspension) where an orientation coefficient of 1 represents a randomly-oriented sample. This texturing reduced the residual stresses generated from the large thermal expansion anisotropy of the control samples, as evidenced by reduced microcracking and morphological texturing of the aligned microstructure.