ANb_(2)O_(6)(A=Ca,Mg,Co,Ni)型铌酸盐陶瓷的制备及其热/力学性质研究  

Synthesis and Thermal/Mechanical Properties Investigations of ANb_(2)O_(6)(A=Ca,Mg,Co,Ni)Ceramics

作　　者：李柏辉 罗可人 张鹤瀛 陈琳[1] 张志彬 种晓宇 梁秀兵 冯晶[1] LI Baihui;LUO Keren;ZHANG Heying;CHEN Lin;ZHANG Zhibin;CHONG Xiaoyu;LIANG Xiubing;FENG Jing(Kunming University of Science and Technology,Kunming 650093,China;National Defense Science and Technology Innovation Research Institute,PLA Academy of Military Sciences,Beijing 100071,China)

机构地区：[1]昆明理工大学,昆明650093 [2]中国人民解放军军事科学院国防科技创新研究院,北京100071

出　　处：《航空制造技术》2021年第16期103-110,共8页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(51762028,91960103);云南省大学生创新训练(202010674009)。

摘　　要：热障涂层在高温下具有良好的隔热防护效果,可为航空发动机、燃气轮机和超高音速飞行器等高温合金零部件提供隔热防护的作用,从而达到延长其服役寿命和提高工作温度的目的。热障涂层陶瓷材料的性能要求主要有低的热导率、高的热膨胀系数、较低的杨氏模量和高的显微硬度等。通过高温固相法制备致密的ANb2O6型铌酸盐陶瓷块体,然后对块体的晶体结构、显微硬度、杨氏模量、热导率和热膨胀系数等性质进行研究。结果显示,所制备的ANb_(2)O_(6)型铌酸盐均为正交相,显微硬度最大值达到7.8GPa,同时具有较低的杨氏模量100~180GPa,其热导率最小值为1.59W/(m·K)(1200℃),并且热膨胀系数最大值为9.1×10^(-6)/K(1200℃),优异的热/力学性质显示ANb_(2)O_(6)型铌酸盐是潜在的热障涂层材料。Thermal barrier coatings(TBCs)have good thermal insulation to protect the high-temperature components of aircraft engine,gas turbine and supersonic aircraft,et al.TBCs are applied to prolong the lifetime and increase the operation temperature of high-temperature components.Low thermal conductivity,high thermal expansion coefficients,comparatively low Young’s modulus and high hardness are required by TBCs.In this work,ANb_(2)O_(6)(A=Ca,Mg,Co,Ni)ceramics are synthesized by a solid-state reaction,and their crystal structures,hardness,Young’s modulus,thermal conductivity and thermal expansion coefficients(TECs)are systematically studied.The maximum value of hardness reaches 7.8GPa,and their Young’s modulus are relatively low(100-180GPa).The lowest thermal conductivity reaches 1.59W/(m·K)(1200℃),and the highest TECs is 9.1×10^(-6) K^(-1)(1200℃).The excellent thermal/mechanical properties pronounce that ANb2O6 ceramics are potential TBCs smaterials.

关 键 词：热障涂层 铌酸盐 陶瓷 力学性质 热导率 热膨胀系数 

分 类 号：TQ174.758.16[化学工程—陶瓷工业]