Paper Title:
Comparison of Conventional and High Velocity Compaction of Alumina Powders
  Abstract

Ceramic compacts can be usually prepared by uniaxial pressing in a die made of stainless steel, but the pressure applied is limited and density gradients occur in many cases. Recently a new forming method in powder metallurgy, the High Velocity Compaction (HVC) has been applied to ceramic powders. This method is similar to conventional pressing but consists in making an ram falling down at a very high speed to the upper punch. The kinetic energy is converted into a strike that produces a high pressure in a really short time. By controlling the kinetic energy, it is possible to apply a desired pressure that can be extremely high (up to 1 GPa) without any damage for the tool. The aim of the study is to compare the process conditions and the properties of green compacts elaborated by the two methods (conventional and HVC) for a similar forming pressure: forming pressure, green density (homogeneity), pore size distribution of the tablets, and then the sintering behavior, the shrinkage, the final density and microstructure of the ceramic material are studied.

  Info
Periodical
Edited by
P. VINCENZINI
Pages
893-898
DOI
10.4028/www.scientific.net/AST.45.893
Citation
D. Souriou, P. Goeuriot, O. Bonnefoy, G. Thomas, S. Drapier, S. Bourdin, L. Lazzarotto, "Comparison of Conventional and High Velocity Compaction of Alumina Powders", Advances in Science and Technology, Vol. 45, pp. 893-898, 2006
Online since
October 2006
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: Bala Vaidhyanathan, Jon Binner
2339
Authors: Kazunari Shinagawa
Abstract:Aiming at the modification of the sinterability of metal/ceramic powder mixtures, the influence of the homogeneity in microstructure on the...
245
Authors: Shi Wen He
Abstract:Warm compacting behaviors of pure titanium powders were studied. The results show that warm compaction can be applied to titanium powders....
2775
Authors: Stella Raynova, De Liang Zhang, D. Polo, L. Gonthier, W. Egea, V.N. Nadakuduru
Abstract:Induction heating of powder compacts could be a very effective method for metal powder consolidation to get the final product or as an...
196
Authors: Jia Min Zhang, Jian Hong Yi, Guo You Gan, Ji Kang Yan, Jing Hong Du, Yi Chun Liu
Chapter 14: Engineering Materials and Processing Technologies
Abstract:In this paper, unlike the traditional powder metallurgy technology, the titanium hydride is directly used as the starting material to...
1823