论文信息 - Comparative Studies on Sintering Behavior of Self‐Propagating High‐Temperature Synthesized Ultra‐Fine Titanium Diboride Powder

Comparative Studies on Sintering Behavior of Self‐Propagating High‐Temperature Synthesized Ultra‐Fine Titanium Diboride Powder

Sintering behavior of nano-sized titanium diboride (TiB2) powder prepared by a self-propagating high-temperature synthesis (SHS) technique was compared with that of the commercially available powder. The SHS-made powder showed excellent sinterability at low temperatures and a maximum of 97% densification was achieved at 2223 K, whereas the identically sintered commercial powder could only be densified to ∼86% at 2223 K. The estimated activation energies for sintering of 35±0.07 kJ/mole and 46±0.7 kJ/mole for the SHS and commercial powder, respectively, indicated the possibility of a different mechanism during sintering.

A. Khanra | M. Godkhindi | L. Pathak

[1] T. Grande,et al. Pressureless Sintering of Titanium Diboride with Nickel, Nickel Boride, and Iron Additives , 2005 .

[2] A. Khanra,et al. Effect of NaCl on the synthesis of TiB2 powder by a self-propagating high-temperature synthesis technique , 2004 .

[3] L. Pathak,et al. Defect structures in zirconium diboride powder prepared by self-propagating high-temperature synthesis , 2004 .

[4] Swapan Das,et al. Sintering studies on ultrafine ZrB_2 powder produced by a self-propagating high-temperature synthesis process , 2000 .

[5] Zhengxiao Guo,et al. The kinetics and mechanism of interfacial reaction in sigma fibre-reinforced Ti MMCs , 1997 .

[6] S. Lawton,et al. Gas-phase combustion synthesis of titanium boride (TiB_2) nanocrystallites , 1996 .

[7] P. Millet,et al. Preparation of TiB2 and ZrB2. influence of a mechano-chemical treatment on the borothermic reduction of titania and zirconia , 1996 .

[8] K. Kelton,et al. Synthesis of titanium boride (TiB)_2 nanocrystallites by solution-phase processing , 1995 .

[9] A. G. Merzhanov,et al. History and recent developments in SHS , 1995 .

[10] John I. McCollum,et al. Shaping of titanium diboride by injection moulding of precursor materials , 1993 .

[11] Z. A. Munir,et al. The sintering of combustion-synthesized titanium diboride , 1987 .

[12] Gerard F. Jones,et al. Preparation and electrical properties of stoichiometric TiB2 thin films , 1981 .