W-1wt％TiC纳米复合材料的组织结构与力学性能

HFCAS OpenIR

	W-1wt％TiC纳米复合材料的组织结构与力学性能
其他题名	Microstructure and mechanical properties of W-1wt % TiC nanocomposite
	2008
发表期刊	中国科学技术大学学报
ISSN	0253-2778
摘要	采用高能球磨结合热压烧结的方法制备了W-1wt％TiC纳米复合材料，并对其组织结构、室温力学性能进行了研究．结果表明，高能球磨能显著细化粉体、减小晶粒尺寸及增加晶格畸变，促进复合粉体的烧结致密化．烧结后，纳米TiC颗粒均匀地分散W基体中，TiC的颗粒尺寸约100nm，呈单分散状态，TiC颗粒与W基体结合紧密，界面上没有析出物出现．纳米TiC颗粒的加入起到细晶强化和晶界强化的作用，提高了复合材料的力学性能．W-1wt％TiC纳米复合材料的致密度、维氏显微硬度、弹性模量、抗弯强度分别由纯W材料的95．6％，3．32GPa，345GPa，730MPa提高到98．4％，4．33GPa，396GPa，1065MPa．
其他摘要	W-1wt% TiC nanocomposite was prepared by high energy ball milling and vacuum hot-pressing （VHP）. The microstructure, room temperature mechanical properties of the composite were investigated in detail. The results show that the particle size of powders decreases to 300 nm, the crystalline size of W decreases and the crystalline distortion increases after milling. High energy ball milling is beneficial to further sintering densification. Nano-TiCp is homogeneously distributed in W matrix due to high energy ball milling and its size is about 100 nm after sintering. No voids or precipitation can be detected at TiC/W interface, indicating excellent interracial bonding. The relative density, vickers microhardness, elastic modulus and fracture strength of W 1wt%TiC nanocomposite is 98.4%, 4. 33 GPa, 396 GPa, 1065 MPa respectively while the monolithic W is 95.6%, 3.32 GPa, 345 GPa, 730 MPa respectively. The improved mechanical properties may be mainly attributed to grain size strengthening and grain boundary strengthening.
关键词	钨基复合材料纳米TiC颗粒组织结构力学性能
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:3272969
引用统计	被引频次：1[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/66233
专题	中国科学院合肥物质科学研究院
推荐引用方式 GB/T 7714	. W-1wt％TiC纳米复合材料的组织结构与力学性能[J]. 中国科学技术大学学报,2008,038.
APA	(2008).W-1wt％TiC纳米复合材料的组织结构与力学性能.中国科学技术大学学报,038.
MLA	"W-1wt％TiC纳米复合材料的组织结构与力学性能".中国科学技术大学学报 038(2008).