Influence of structure and porosity sintered titanium nanolaminate-composites on mechanical properties at room temperature

 
A.N. Demidik,
   
N.A. Krylova,
 
E.Pechkovskiy,
 
A.P. Polushko,
  

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Electron Microscopy and Strength of Materials - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2008, #15
http://www.materials.kiev.ua/article/326

Abstract

By the method of an automatic indentation (Р≤3 N) influence of cumulative presence of porosity and particles of the second phase in various ratio on mechanical properties of new ceramic materials - porous two-phase titanium nanolaminate-composites Ti3SiC2/TiC, Ti3AlC2/TiC, Ti4AlN3/TiN at room temperature (θ=3-35%), content TiC (TiN) - 5-70 %) was investigated. Materials are made by a method of reactionary sintering. In porous nanolaminates - composites at the contents of a titanium carbide TiC (TiN) <20 % the increase in porosity results in decrease in strength and increase of plasticity. Appreciable increase of strength of porous composites is marked at contents TiC (TiN)> 25-30 %. On increase in mechanical properties and resistance to deformation they settle down in the following sequence: Ti3AlC2/TiC - Ti4AlN3/TiN - Ti3SiC2/TiC.


AN AUTOMATIC INDENTATION, NANOLAMINATES - COMPOSITES, PLASTICITY, POROSITY, STRENGTH, THE SECOND PHASE