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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%。
Aiming at Al-Fe2O3 aluminum thermal system, ceramic composite steel tube was prepared by centrifugal SHS technique using SiO2 and Na2B4O7 as additive. The effects of adding 7% SiO2 and 2%, 4% and 6% Na2B4O7 Effect of ceramic tube structure and mechanical properties of composite pipe. XRD analysis showed that the main components of the ceramic layer-αAl2O3, FeAl2O4, Al2SiO5, B2O3, etc .; SEM observed that the surface of the ceramic layer grains arranged dense, combined with energy dispersive spectroscopy ceramic layer containing Fe; metallographic microscope results show that the ceramic The test results show that the shear strength and crush strength of ceramic composite pipe with mass fraction of 7% SiO2 and 4% Na2B4O7 are respectively Reaching 22 MPa and 430 MPa, respectively, increased by 240% and 22.8% respectively compared with the samples without additives.