六チタン酸カリウム短繊維/ガラスセラミック複合体の作製

概要

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Potassium hexatitanate short fiber/A-W glass-ceramic composite was prepared, and the chemical and morphlogical change of the fibers during firing and the mechanical properties of the composite were investigated. Potassium in the fibers started to disappear at 800℃. As potassium hexatitanate has a unidirectional tunnel structure, in which potassium ion occupy the tunnel space, potassium ions diffuse from the fiber to the matrix along the tunnel once flaws are formed in the fiber. As a result, the fibers developed a specific morphology in which the rutile grains were arranged fibrously. The bending strength of the composite was lower than that of the monolithic glass-ceramic, however, the fracture toughness improved with increasing firing temperature.
社団法人日本セラミックス協会の論文
1997-12-01