화학공학소재연구정보센터
Journal of Materials Science, Vol.41, No.22, 7425-7436, 2006
Oxide ceramic laminates with highly textured alpha-alumina interlayers: I. Texture control and laminate formation
Three kinds of texture-reinforced oxide ceramic laminates with strongly bonded interfaces have been fabricated. All three were based on highly textured alpha-alumina interlayers, but each with a different oxide laminate matrix and a correspondingly different thermal mismatch between the textured interlayers and the matrix. Alginate-based, aqueous gel casting was used to produce a flexible tape for all the compositions studied. The highly textured alumina (TA) interlayers were derived from gel-cast tapes containing aligned alumina seed platelets. It has been found that the strongest texture derived from 9.1 vol% of the seed platelets in the gelled precursor tape. Using the March-Dollase model for texture analysis, the oriented volume fraction in the highly textured interlayers was estimated to vary from 60 to 80%.