Paper Title:
Nano-Al2O3 Reinforced Fe-Cr-Ni Composites Fabricated by Reactive Hot Pressing
  Abstract

Based on low-temperature hot-press sintering and rapid thermit reaction, heat-resistant metal matrix composites with nano-ceramic reinforcement were prepared via reactive hot pressing. According to XRD, the composites comprised predominantly of (fcc) Cr0.19Fe0.7Ni0.11, (fcc) Fe-Cr and alumina at 700°C through the highly-exothermic thermit reaction between the starting powders. Three-point bending strength, fracture toughness, Vickers hardness and relative density increased with the increase of hot-press sintering temperature and holding time. The improving mechanical properties may be explained by increasing of content of (fcc) Cr0.19Fe0.7Ni0.11. SEM analysis showed a microstructure consisting of equiaxial granules at 700°C for 1 h and a uniformly dispersed network of very fine grains at 700°C for 2 h. It is considered that, in the reactive hot-pressing process, Al atoms diffused into the metal matrix (Fe2O3, Cr, Ni) sites and formed Al2O3 and Fe-Cr-Ni matrix. Such a technique offers the possibility of synthesizing heat-resistant metal matrix composites with nano-ceramic reinforcement materials at considerably lower temperature.

  Info
Periodical
Materials Science Forum (Volumes 544-545)
Edited by
Hyungsun Kim, Junichi Hojo and Soo Wohn Lee
Pages
87-90
DOI
10.4028/www.scientific.net/MSF.544-545.87
Citation
C. Chen, T. Yu, J. F. Yang, J. Q. Gao, Z. H. Jin, K. Niihara, "Nano-Al2O3 Reinforced Fe-Cr-Ni Composites Fabricated by Reactive Hot Pressing ", Materials Science Forum, Vols. 544-545, pp. 87-90, 2007
Online since
May 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: F. Romero, Vicente Amigó, M.D. Salvador, A. Vicente
Abstract:Titanium metal matrix composites were produced. The powder metallurgy route applied was a conventional route consisting of blending titanium...
817
Authors: Jing Kun Guo, Hua Min Kou, Yu Bai Pan
Abstract:The main problems for multiphase materials are the even mixing and the bonding or reacting among two or more phases, as well as the states...
233
Authors: Tao Jiang, Hai Yun Jin, Zhi Hao Jin, Jian Feng Yang, Guan Jun Qiao
Abstract:The machinable B4C/BN ceramics composites were fabricated by hot-pressing sintering process at 1850oC for 1h under the pressure of 30MPa....
53
Authors: Zhu Rui, Yu Tao Zhao, Song Li Zhang, Zhi Hong Jia
Chapter 1: Non-Ferrous Metal Material
Abstract:Abstract:Aluminum matrx composites reinforced by in situ ZrB2 particles are fabricated from A356-AlB-K2ZrF6 system via in-situ melt reaction...
122
Authors: Dong Chen, Zhe Chen, Peng Zhang, Yi Jie Zhang, Haiheng Ma, Hao Wei Wang
Chapter 5: Metal Alloy Materials
Abstract:In-situ TiB2 particles reinforced AA7055 composites were fabricated through mixed-salts route and their bending properties were...
1005