等离子活化烧结制备石墨烯/羟基磷灰石复相生物陶瓷  

Synthesis of Graphene/Hydroxyapatite Composite Bioceramics via Plasma Activated Sintering

作　　者：张彪[1] 杨长安[1] 施佩[1] ZHANG Biao;YANG Chang-An;SHI Pei(School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China)

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021

出　　处：《无机材料学报》2018年第12期1355-1359,共5页Journal of Inorganic Materials

基　　金：陕西省科技统筹创新工程项目(2017TSCXL-GY-07-05;2015KTTSGY02-03);陕西科技大学博士科研启动基金(2017BJ-26);陕西科技大学研究生创新基金项目~~

摘　　要：以羟基磷灰石(Hydroxyapatite,HAp)为基体,石墨烯(Graphene,rGO)作为增强相,利用等离子活化烧结制备了石墨烯/羟基磷灰石(rGO/HAp)复相生物陶瓷。系统研究了rGO添加量对HAp陶瓷基体物相结构、生物活性及断裂韧性的影响。结果表明,rGO的加入有利于提高HAp陶瓷的生物活性。同时,复相生物陶瓷的硬度与断裂韧性随rGO添加量的增加均表现出先升高,后显著降低的变化趋势。当rGO添加量为2wt%时,样品的硬度与断裂韧性分别达到6.97 GPa和0.84 MPa?m^(1/2),较纯相HAp陶瓷提高了11.5%和37.3%。研究表明rGO的拔出效应是导致复相陶瓷力学性能提高的主要原因。Graphene/hydroxyapatite (rGO/HAp) composite bioceramics were fabricated by plasma activated sintering using hydroxyapatite (HAp) as matrix and graphene (rGO) as reinforced phase. The effects of rGO addition on phase structure, bioactivity and fracture toughness of HAp ceramics matrix were systematically investigated. The results indicate that the incorporation of rGO is beneficial to promoting the bioactivity of HAp ceramics. Meanwhile, hardness and fracture toughness of composite bioceramics initially increase and then decrease significantly with rGO concentration increasing. The hardness and fracture toughness of the specimen with rGO loading of 2wt% reach 6.97 GPa and 0.84 MPa?m 1/2 , which display ~11.5% and ~37.3% improvements as compared to pure HAp ce- ramics, respectively. It is demonstrated that the pull-out effect of rGO is the major reason for enhancing the mechanical properties of composite ceramics.

关 键 词：羟基磷灰石 石墨烯 等离子活化烧结 生物活性 断裂韧性 

分 类 号：TB321[一般工业技术—材料科学与工程]