May 9, 2025 Home   |   About Journal   |   Editorial Board   |   Instruction   |   Subscriptions   |   Contacts Us   |   中文
Materials Science and Engineering of Powder Metallurgy  2023, Vol. 28 Issue (4): 390-403    DOI: 10.19976/j.cnki.43-1448/TF.2023047
Engineering and Technology Current Issue | Archive | Adv Search |
Microstructures and properties of carbon fiber powders modified iron-based powder metallurgy materials
WANG Jiayu1, FANG Huachan1, ZHANG Qianqian1, DUAN Zhiying1, FANG Zhou1, ZHANG Zhuo2, CHEN Zhuo1, XU Yongxiang3, REN Zian1
1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Advance Research Center, Central South University, Changsha 410083, China;
3. CRRC Qishuyan Institute Co., Ltd., Changzhou 213011, China
Download: PDF (1492 KB)   HTML (1 KB) 
Export: BibTeX | EndNote (RIS)      
Abstract  MCsf/Fe and Cfp/Fe powder metallurgy materials were prepared by pressing-vacuum sintering using reduced Fe powder as the matrix, micron short carbon fibers (MCsf) with a length of about 20 μm and carbon fiber particles (Cfp) with a particle size of 1-4 μm as the dispersoid, respectively. Natural graphite (NG) with an average particle size of 10 μm as the raw material was used to prepare NG/Fe powder materials for comparison. The effects of micronshort carbon fibers and carbon fiber particles on the microstructure, physical properties, mechanical properties and dimensional changes were investigated. The results show that the activity of carbon fiber particles is much higher than that of graphite and degummed short carbon fibers (DCsf), and the maximum mass loss rate at 800 ℃ in air atmosphere is 3.75 times that of graphite and 16.6 times that of degummed short carbon fibers. Compare with NG/Fe and MCsf/Fe powder metallurgy materials, the dimensional stability of Cfp/Fe powder metallurgy materials during sintering is greatly improved, with the maximum radial expansion and shrinkage rates of 0.39% and 0.14%, respectively; the strength and toughness are the highest, with the density, flexural strength, shear strength and tensile strength of 6.91 g/cm3, 736.9 MPa, 205.7 MPa and 334.8 MPa, respectively. The elongation reach 10.5%, and the fracture mode of the materials change from a brittle along-crystal fracture to a completely severe nest fracture.
Key wordsFe      short carbon fiber      sintering shrinkage rate      activity      mechanical property      dimensional change     
Received: 21 April 2023      Published: 21 September 2023
ZTFLH:  TF125  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
WANG Jiayu
FANG Huachan
ZHANG Qianqian
DUAN Zhiying
FANG Zhou
ZHANG Zhuo
CHEN Zhuo
XU Yongxiang
REN Zian
Cite this article:   
WANG Jiayu,FANG Huachan,ZHANG Qianqian, et al. Microstructures and properties of carbon fiber powders modified iron-based powder metallurgy materials[J]. Materials Science and Engineering of Powder Metallurgy, 2023, 28(4): 390-403.
URL:  
http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2023047     OR     http://pmbjb.csu.edu.cn/EN/Y2023/V28/I4/390
Copyright © Editorial Board of Materials Science and Engineering of Powder Metallurgy
Tel: 0731-88877163 E-mail: pmbjb@csu.edu.cn
Supported by: Beijing Magtech