Toughening of Glasses by Metallic Particles
Toughening of Glasses by Metallic Particles
复制标题
DOI：
10.1111/j.1151-2916.1981.tb10313.x
复制
发表时间：
1981-09
影响因子：
3.9
通讯作者：
VLADIMIR V. Krstic;PATRICK S. Nicholson;Richard G. Hoagland
中科院分区：
文献类型：
--
作者：
VLADIMIR V. Krstic;PATRICK S. Nicholson;Richard G. Hoagland
研究了弹性、热弹性和界面特性在金属第二相颗粒增韧脆性基体中的作用。研究了两种复合材料：玻璃+部分氧化的Ni颗粒（玻璃的热膨胀系数低于、等于和高于Ni的热膨胀系数）和玻璃+部分氧化的Al颗粒（热膨胀和弹性模量相等）。镍与其氧化物之间的弱界面结合以及应力集中是玻璃/镍复合材料中发现的主要韧性限制。当第二相的热膨胀系数和弹性模量充分大于玻璃基质的热膨胀系数和弹性模量时，传播的裂纹将绕过颗粒。当热应力和弹性应力最小化并实现令人满意的粘合（玻璃/铝复合材料）时，韧性增加了 60 倍。
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.