Premium
Toughening of Glasses by Metallic Particles
Author(s) -
KRSTIC VLADIMIR V.,
NICHOLSON PATRICK S.,
HOAGLAND RICHARD G.
Publication year - 1981
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1981.tb10313.x
Subject(s) - materials science , thermal expansion , composite material , elastic modulus , brittleness , thermoelastic damping , toughness , phase (matter) , metal , thermal , metallurgy , thermodynamics , chemistry , physics , organic chemistry
The role of elastic, thermoelastic, and interfacial properties in the toughening of a brittle matrix by metallic second‐phase particles was studied. Two composites were studied: glass+partly oxidized Ni particles (thermal expansion coefficient of the glasses lower than, equal to, and higher than that of Ni) and glass+partly oxidized Al particles (thermal expansion and elastic moduli equal). Weak interfacial bonding between the nickel and its oxide and developed stress concentrations are the major toughness limitations found in the glass/Ni composites. When the thermal expansion coefficient and elastic modulus of the second phase are sufficiently greater than that of the glass matrix, a propagating crack will bypass the particles. When the thermal and elastic stresses are minimized and satisfactory bonding is achieved (glass/Al composites), a 60x toughness increase was realized.