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添加剂对离心SHS陶瓷复合钢管组织性能的影响

, PP. 80-84

Keywords: 自蔓延高温合成,添加剂,陶瓷层,复合钢管,力学性能

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Abstract:

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α-Al2O3、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22MPa和430MPa,比未添加添加剂的样品分别提高了240%和22.8%。

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