C_(f)-ZrW_(2)O_(8)/9621复合材料制备及碳纤维和ZrW2O8含量对其热膨胀的影响  

Preparation of C_(f)-ZrW_(2)O_(8)/9621 matrix composites and effects of carbon fiber and ZrW2O8 content on their thermal expansion

作　　者：鞠录岩 宁银磊 申易 林浩瀚 李伟 郭婧 JU Luyan;NING Yinlei;SHEN Yi;LIN Haohan;LI Wei;GUO Jing(Mechanical and Electrical Department,Mechanical Engineering College,Xi'an Shiyou University,Xfan 710065,China;Xi'an Key Laboratory for Integrity Evaluation of Highly Difficult and Complex Oil and Gas Wells,Xi'an 710065,China;Lao Junmiao Oil Production Plant,Yumen Oilfield Branch,China National Petroleum Corporation,Yumen 735200,China)

机构地区：[1]西安石油大学机械工程学院机电工程系,西安710065 [2]西安市高难度复杂油气井完整性评价重点实验室,西安710065 [3]中国石油天然气股份有限公司玉门油田分公司老君庙采油厂,甘肃玉门735200

出　　处：《材料科学与工艺》2022年第4期25-32,共8页Materials Science and Technology

基　　金：国家自然科学基金青年项目(51905426);国家自然科学基金面上项目(51974246);陕西省重点研发计划项目(2020KW-015);西安石油大学研究生创新与实践能力培养项目(YCS21211052)。

摘　　要：热膨胀是影响复合材料性能和使用寿命的主要因素之一。为研究具有低/负热膨胀的复合材料,本文以碳纤维粉、Zr_(2)WO_(8)颗粒和环氧树脂为原料,采用模压法制备了C_(f)-ZrW_(2)O_(8)/9621环氧树脂基复合材料,研究了碳纤维粉和Zr_(2)WO_(8)颗粒含量对复合材料热膨胀行为的影响规律,并分析了不同温度区间内C_(f)-ZrW_(2)O_(8)/9621环氧树脂基复合材料热膨胀的变化规律。研究结果表明:在30~200℃范围内,当Zr_(2)WO_(8)颗粒含量不变时,随着碳纤维粉含量的增加复合材料的平均热膨胀系数逐渐降低,其中碳纤维粉含量增加到12%时,复合材料的平均热膨胀系数最低,为29.9×10^(-6)/℃,降低了约60%;当碳纤维粉含量不变时,Zr_(2)WO_(8)颗粒含量逐渐增加到12%时,复合材料的平均热膨胀系数呈现先减小后增加的趋势,当Zr_(2)WO_(8)颗粒含量为9%时,复合材料的热膨胀系数最低,为40.8×10^(-6)/℃,降低了约28%。在30~200℃范围内,C_(f)-ZrW_(2)O_(8)/9621复合材料在热膨胀过程中,温度升高后试样长度的变化量d_(_L)与试样原始长度L_(0)的比值出现增加、减小和增加3个阶段。碳纤维粉和Zr_(2)WO_(8)颗粒均能够降低复合材料的热膨胀系数,但碳纤维粉降低复合材料热膨胀的效果比Zr_(2)WO_(8)颗粒更好些。Thermal expansion is a main factor that affects the performance and service life of composite materials. To study the low/negative thermal expansion of composite materials, carbon fiber powder, Zr_(2)WO_(8)particles, and epoxy resin were taken as raw materials to prepare C_(f)-ZrW_(2)O_(8)/9621 epoxy resin matrix composites by molding. The influences of content of carbon fiber powder and Zr_(2)WO_(8)particles on the thermal expansion behavior of composite materials were studied, and the variation of thermal expansion of C_(f)-ZrW_(2)O_(8)/9621 epoxy resin matrix composites was analyzed under different temperature ranges. Research results show that within 30~200 ℃, when the content of Zr_(2)WO_(8)particles remained stable, as the content of carbon fiber powder gradually increased, the average thermal expansion coefficient of the composite material reduced. When the content of carbon fiber powder increased to 12%, the average thermal expansion coefficient of the composite material reached the lowest of 29.9×10^(-6)/℃, decreased by about 60%. When the content of carbon fiber powder was unchanged, the content of Zr_(2)WO_(8)particles gradually increased to 12%, and the average thermal expansion coefficient of the composites first decreased and then increased. When the Zr_(2)WO_(8)particle content was 9%, the thermal expansion coefficient of the composite material was the lowest(40.8×10^(-6)/℃), reduced by about 28%. Within the scope of 30~200 ℃, the value of d_(L)/L_(0)(the ratio of the change amount dto the original length Lof the sample under elevated temperature) of the C_(f)-ZrW_(2)O_(8)/9621 composite materials experienced three stages of increase, decrease, and increase in the process of thermal expansion. Carbon fiber powder and Zr_(2)WO_(8)particles can both reduce the thermal expansion coefficient of composite materials, but the effect of carbon fiber powder was better than that of Zr_(2)WO_(8)particles.

关 键 词：碳纤维粉 钨酸锆颗粒 热膨胀系数 膨胀量 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]