摘要
针对Al-Fe2O3铝热体系,采用SiO2和Na2B4O7作为添加剂,利用离心自蔓延高温合成(SHS)技术制备了陶瓷复合钢管,研究了添加质量分数7%SiO2和2%、4%、6%Na2B4O7对复合管陶瓷层组织结构和力学性能的影响。XRD分析结果表明陶瓷层的主要成分有-αAl2O3、FeAl2O4、Al2SiO5、B2O3等;SEM观察发现陶瓷层表面晶粒排布致密,结合能谱分析陶瓷层中含有Fe单质;金相显微镜观察结果表明陶瓷层和Fe过渡层结合良好,没有间隙存在;复合钢管的抗剪强度和压溃强度测试结果表明:添加质量分数为7%SiO2和4%Na2B4O7的陶瓷复合钢管的抗剪强度和压溃强度分别达到22 MPa和430 MPa,比未添加添加剂的样品分别提高了240%和22.8%。
7% mass fraction of SiO2and 2%,4% and 6% mass fraction of Na2B4O7 were added as additives into the system of A1-Fe2O3 to examine their effects on the microstructures and properties of ceramic compound pipes made by centrifugal SHS（self-propagating high temperature synthesis） process.It was found that ceramic layer is mainly composed of α-Al2O3,FeAl2O4,Al2SiO5 and B2O3 by XRD analysis.The surfaces on ceramic layer by SEM are much denser than that without additives,and Fe is also found in ceramic layer combined with the EDS analysis.The results show that inner ceramic layer and transition iron layer combine well without any gap observed by metallurgical microscope.It is also found that the shearing strength of the ceramic layer and crushing strength of the composite pipe under 7%SiO2＋4%Na2B4O7（mass fraction） are 22MPa and 430MPa,respectively,which are 240% and 22.8% greater than those without additives.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2011年第3期80-84,共5页
Acta Materiae Compositae Sinica
基金
江苏省高校自然科学基金(08KJD430019)
南通大学机械工程学院自然科学研究项目(05024277)
关键词
自蔓延高温合成
添加剂
陶瓷层
复合钢管
力学性能
self propagating high temperature synthesis （SHS）
additives
ceramic layer
compound pipes
mechanical property
