Premium
Strong, Tough Glass‐Ceramics for Emerging Markets
Author(s) -
Fu Qiang,
Beall George H.,
Smith Charlene M.,
Kohli Jeffrey T.,
Youngman Randall E.,
Wheaton Bryan R.,
Credle Allen J.,
Gulbiten Ozgur
Publication year - 2016
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/ijag.12247
Subject(s) - crystallization , viscosity , materials science , ceramic , work (physics) , composite material , thermodynamics , engineering physics , forensic engineering , mechanical engineering , chemical engineering , engineering , physics
The discovery of glass‐ceramics, that is, the controlled crystallization of glass, by S. Donald Stookey was a mixture of serendipitous events involving both chance and exploratory research related to a practical concept. However, a combination of awareness of related literature, good observation skills, deductive reasoning, and a strong curiosity for exploratory work, was crucial for this chance event to bear fruit. As was the present case, a review of this story always stimulates new approaches for understanding of the fundamentals of crystallization and the design of glass‐ceramics with improved properties. Two experiments of particular interest are presented in this paper. The first focuses on the change of viscosity of a specimen as a function of crystallization, while the second addresses the improvement of crack resistance by manipulating thermal history during crystallization. Our work reveals that glass‐ceramic viscosity, that is, bulk viscosity during crystallization, is influenced by both temperature and phase assemblage. Further, as observed by Stookey, more than 60 years ago, high viscosity is important in controlling the shape of the final product. Finally, thermal history is shown to have a marked influence on the crack resistance of glass‐ceramics.