纳米铝热体系制备陶瓷复合钢管组织及性能  

Microstructure and mechanical properties of ceramic-lined composite steel pipes produced by SHS centrifugal-nano-thermite process

作　　者：朱昱[1] 孙书刚[1] 黄锋[1] 倪红军[1] 

机构地区：[1]南通大学机械工程学院,江苏南通226019

出　　处：《材料热处理学报》2012年第2期21-25,共5页Transactions of Materials and Heat Treatment

基　　金：江苏省科技支撑计划(工业)项目(BE2009090);江苏省高校自然科学基金资助项目(08KJD430019);南通大学机械工程学院2011年院级自然科学类科研基金项目(J2011008)

摘　　要：采用纳米铝热体系制备了陶瓷复合钢管,研究了纳米铝热剂中添加4%Na2B4O7+2%、4%、6%、8%(质量分数)纳米SiO2对其组织性能的影响。XRD分析结果表明,陶瓷层主相为α-Al2O3和FeAl2O4,杂相为Al2SiO5和B2O3;金相显微镜和SEM观察表明,α-Al2O3枝晶较细,排布密集,FeAl2O4呈晶间分布;测试结果表明陶瓷致密度可达95%,压溃强度和压剪强度分别可达499 MPa、22.6 MPa。Ceramic-lined composite steel pipes were prepared by SHS centrifugal-thermite process using a nano-thermite system containing Na2B4O7 and nano-SiO2 powders.Microstructure and properties of the composite steel pipes were studied by means of SEM and EDS analysis,XRD and mechanical property tests.The results show that the ceramic layer consists of main crystal phases of α-Al2O3 and FeAl2O4,with small amount phases of Al2SiO5 and B2O3,in which small and dense dentrites of α-Al2O3 with FeAl2O4 phase distributed along the grain boundaries are observed.The relative density of the ceramic layer is up to 95%,and the crushing strength and shearing strength of the composite pipes are 499 MPa and 22.6 MPa,respectively.

关 键 词：纳米SIO2 纳米铝热剂 陶瓷复合钢管 组织性能 

分 类 号：TB333[一般工业技术—材料科学与工程]