摘要
在自蔓延离心法制备陶瓷内衬钢管过程中,用钛粉取代部分铝粉,研究了钛粉对燃烧过程、陶瓷层性能及组织的影响。利用XRD分析陶瓷层的相组成,利用SEM和EDS分析陶瓷层的微观组织。结果表明,加入钛粉后,反应的绝热燃烧温度不变,反应速度降低。当钛粉加入量为3.9%时,陶瓷层致密度最大,可达96.8%。加入钛粉后,复合钢管的压溃强度,压剪强度得到提高,陶瓷层硬度略有下降。陶瓷内衬层主要由α-Al_2O_3和少量的FeAl_2O_4,FeAlTiO_5组成,α-Al_2O_3晶粒为等轴晶。
Some fraction of aluminum powder was replaced with titanium powders during the process of produce ceramic-lined composite pipe using centrifugal self-propagation high-temperature synthesis（SHS） process . This study focused on the titaniu microstructures and properties. Coatingm＇s effect on the combustion process and the ceramic coating＇s phases were determined by X-ray diffraction （XRD）. The microstructure of the coating was analyzed by scanning electron microscopy （SEM） and energy dispersion spectroscopy （EDS）. The result indicates that the adiabatic combustion temperature was invariable and the combustion reaction rate decreased when the titanium powders were added. It is show that the density of the ceramic coating improves to 96.8% under the condition of adding in titanium powder 3.9%. When the titanium powders were added, the composite pipet radial crushing strength and the compressive shear strength of the composite pipes are increased but the hardness of the coating is decreased. The ceramic layer is mainly composed of α-Al2O3, FeAl2O4 and FeAITiO5, and α-Al2O3 is equiaxed crystal grains .
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2007年第4期627-631,803,共6页
Bulletin of the Chinese Ceramic Society
关键词
自蔓延
陶瓷内衬钢管
钛
SHS
ceramic-lined composite pipe
titanium
