| 水基流延成型和热压烧结制备碳化硼陶瓷及性能研究 |
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| 引用本文： | 刘维良,刘硕琦,林幸,谈军.水基流延成型和热压烧结制备碳化硼陶瓷及性能研究[J].人工晶体学报,2009,38(4):989-993. |
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| 作者姓名： | 刘维良 刘硕琦 林幸 谈军 |
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| 作者单位： | 景德镇陶瓷学院,景德镇,333001;北京科技大学,北京,100083 |
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| 基金项目： | 国防科工委军品配套研制项目资助课题 |
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| 摘 要： | 以工业碳化硼粉末为原料、采用Si3N4磨球磨损法引入Si3N4烧结助剂,采用水基流延成型和热压烧结方法制备了碳化硼陶瓷.研究了氧含量、分散剂、pH值等因素对B4C陶瓷浆料分散性能的影响,采用XRD、SEM等对碳化硼陶瓷的物相、显微结构和第二相分布进行了表征,并测试了样品的维氏硬度、断裂韧性、抗弯强度和弹性模量.结果表明:经醇洗后的碳化硼粉末中氧化硼含量降低,有利于B4C陶瓷浆料的分散稳定.采用球磨磨损引入了Si3N4粉,在B4C基体中通过原位反应形成第二相SiC和BN,SiC和BN第二相颗粒在B4C基体中弥散分布均匀.在2100 ℃热压烧结样品的维氏硬度、抗弯强度、断裂韧性和弹性模量分别达到30.2 GPa、596.5 MPa、3.36 MPa·m1/2和362.3 GPa.
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| 关 键 词： | 碳化硼陶瓷 Si3N4掺杂 水基流延成型 热压烧结 力学性能 |
Study on Preparation and Properties of B_4C Ceramic by Aqueous Tape Casting and Hot-press Sintering |
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| LIU Wei-liang,LIU Shuo-qi,LIN Xing,TAN Jun.Study on Preparation and Properties of B_4C Ceramic by Aqueous Tape Casting and Hot-press Sintering[J].Journal of Synthetic Crystals,2009,38(4):989-993. |
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| Authors: | LIU Wei-liang LIU Shuo-qi LIN Xing TAN Jun |
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| Institution: | 1.Jingdezhen Ceramic Institute;Jingdezhen 333001;China;2.University of Science & Technology Beijing;Beijing 100083;China |
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| Abstract: | B4C ceramic was prepared by aqueous tape casting and hot-pressing sintering using boron carbide powder as starting material,and Si3N4 as the additives introduced by ball-milling method.The influences of the oxygen content,dispersant,pH value on the properties of B4C slurry were studied.The phase,microstructure and the distribution of the second phase were analyzed by XRD and SEM.The Vickers hardness,fracture toughness,bending strength and elastic modulus of composites were also tested.The results indicate t... |
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| Keywords: | B4C ceramic Si3N4 doping aqueous tape casting hot-press sinering mechanical properties |
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