复合材料界面强度的Marshall法测定及其与材料断裂韧性的关系

来源期刊：中南大学学报(自然科学版)1993年第5期

论文作者：王零森 陈柏新 吕海波 陈熙

文章页码：616 - 621

关键词：界面粘结强度; 纤维强化复合材料; 碳化硅纤维; 断裂韧性; 硅硼酸盐玻璃

Key words：interface bond strength; fiber reinforced composite; SiC fiber; fracture toughness; borosilicate glass

摘    要：成功地用Marshall法测定了Nicalon SiC/7740玻璃复合材料的界面强度τ,研究了纤维在600℃空气中热暴露时的失重、热暴露时间t对τ的影响,以及τ与断裂韧性K₁₀的关系。研究发现:随着t的延长,开始纤维失重剧烈增加,之后趋于恒定。同时发现:在实验范围内,随着t的延长,τ增加,K₁₀激剧下降,即K₁₀随τ的增加而下降。

Abstract: The interface bond strength,τ,of Nicalon SiC/7740 glass composite was measured using Marshall indentation method in the present paper.The weight-loss of fiber exposured in air at 600℃,the effect of exposing time on τ,the relationship between τ & fracture toughness K_1c were also dealt with.It was discovered that the weight-loss of fiber increased sharply,then reached to a constant,with the exposing time elongating.It was also discovered thatthe τ value increased and K_1c decreased with t in the rang of experiment,e.g.K_? decreased with τ increasing.A necessary analysis and discussing was also given in the present paper.