摘要
分别以石墨和TiC为碳源,以微米级Ti粉、Al粉为原料,采用固-液相原位热压烧结方法制备了不同反应物合成的致密层状Ti3AlC2陶瓷材料.采用XRD、SEM分析了产物的形貌和相组成,并对其力学性能进行了分析测试.研究表明:在1 300℃、25 MPa条件下,以TiC/Al/Ti混合粉末体系为原料,热压烧结可以获得纯度较高的致密Ti3AlC2层状陶瓷材料;Ti3AlC2陶瓷材料的断裂韧度KIC为5.60 MPa.m1/2,维氏硬度在HV 400～600之间,抗弯强度为454.7 MPa,抗压强度可达764 MPa.研究表明,晶粒细化是其力学性能提高的主要原因.
With micron-grade Ti,Al,graphite,and TiC powders as the raw materials,dense layered Ti3AlC2 ceramic material was prepared by in-situ solid-liquid phase reaction by the hot-pressing sintering method.XRD and SEM were used to analyze the pattern of products and phase composition,and their mechanical property was tested.The results show that pure dense Ti3AlC2 ceramic with a layered structure can be achieved by hot-pressing sintering with TiC/Al/Ti mixed-powder as the raw materials under 1 300℃,25 MPa.Vickers＇s hardness,flexural strength,fracture toughness,and compressive strength were 400-600 HV,454.7 MPa,5.60 MPa·m1/2 and 764 MPa,respectively.The results show that mechanical property can be improved by refining crystal grains.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2010年第12期1679-1681,共3页
Journal of Harbin Engineering University
基金
中央高校基本科研业务费专项资金资助项目(HEUCF101011)
