Dynamically Controlled Formation of TiN by Combustion of Ti in Air

This paper studies the formation of titanium nitride (TiN) by combustion of Ti particles in air. It is proposed that the combustion reaction is a dynamically controlled process, in which the formation of TiN is fulfilled by delayed gas infiltration behind the propagation of combustion wave. With the addition of NH4Cl or carbon black, the yield of TiN can be enhanced. The as-synthesized TiN grains show a terraced morphology with parallel layers stacked in the normal direction. It is thought that this terraced morphology has been derived from a surface-coarsening process. The parallel layers show regular hexagonal outlines and thus are considered to be (111) planes according to the symmetric characters of the FCC structure. The (111) texture is also revealed by X-ray diffraction results, where the relative intensity of (111) peak is clearly higher than the reference in the JCPDS card. In addition, nanoscale twinning areas are observed in TiN grains. From transmission electron microscopy (TEM) results, it is determined that the twinning plane is (111) and the twinning direction is [211]. The movement of atoms during twinning is discussed according to the FCC structure of TiN and high-resolution TEM images.

[1]  Lianjun Wang,et al.  Consolidation of Nano‐Sized TiN Powders by Spark Plasma Sintering , 2006 .

[2]  D. Cahill,et al.  Nucleation kinetics versus nitrogen partial pressure during homoepitaxial growth of stoichiometric TiN(0 0 1): A scanning tunneling microscopy study , 2005 .

[3]  A. Gromov,et al.  Study of aluminum nitride formation by superfine aluminum powder combustion in air , 2004 .

[4]  S. Kodambaka,et al.  Dislocation-driven surface dynamics on solids , 2004, Nature.

[5]  Chien-Chong Chen,et al.  Combustion synthesis of hexagonal aluminum nitride powders under low nitrogen pressure , 2003 .

[6]  H. Miao,et al.  Hard and wear-resistant titanium nitride coatings for cemented carbide cutting tools by pulsed high energy density plasma , 2003 .

[7]  S. Kodambaka,et al.  Pathways of atomistic processes on TiN(001) and (111) surfaces during film growth: An ab initio study , 2003 .

[8]  V. Krstić,et al.  Reaction sintering of TiN-TiB2 ceramics , 2003 .

[9]  J. Subrahmanyam,et al.  Formation of TiN whiskers through carbothermal reduction of TiO2 , 2002 .

[10]  S. Kodambaka,et al.  Absolute TiN(111) step energies from analysis of anisotropic island shape fluctuations. , 2002, Physical review letters.

[11]  S. Shimada,et al.  Highly electroconductive TiN/Si3N4 composite ceramics fabricated by spark plasma sintering of Si3N4 particles with a nano-sized TiN coating , 2002 .

[12]  J. Ferreira,et al.  Combustion synthesis of AlNSiC solid solution particles , 2000 .

[13]  Z. Yang,et al.  Nanostructured TiN powder prepared via an integrated mechanical and thermal activation , 2000 .

[14]  W. Lee,et al.  Combustion synthesis of Si_3N_4 powder , 1997 .

[15]  M. Inagaki,et al.  Aluminium nitride synthesis in air from aluminium and graphite mixtures mechanically activated , 1997 .

[16]  L. Lozzi,et al.  Study by X-ray photoelectron spectroscopy and X-ray diffraction of the growth of TiN thin films obtained by nitridation of Ti layers , 1996 .

[17]  Lars Hultman,et al.  Development of preferred orientation in polycrystalline TiN layers grown by ultrahigh vacuum reactive magnetron sputtering , 1995 .

[18]  K. Nakano,et al.  Effect of aluminium addition on TiN hot-press sintering , 1995 .

[19]  John J. Moore,et al.  Combustion synthesis of advanced materials: Part I. Reaction parameters , 1995 .

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

[21]  M. Inagaki,et al.  Self‐Combustion Reactions Induced by Mechanical Activation: Formation of Aluminum Nitride from Aluminum–Graphite Powder Mixture , 1994 .

[22]  Jung Ho Je,et al.  Effects of strain energy on the preferred orientation of TiN thin films , 1993 .

[23]  Z. A. Munir,et al.  Effect of Nitrogen Pressure and Diluent Content on the Combustion Synthesis of Titanium Nitride , 1990 .

[24]  Z. A. Munir,et al.  Self-propagating exothermic reactions: the synthesis of high-temperature materials by combustion , 1989 .

[25]  H. Wriedt,et al.  The N-Ti (Nitrogen-Titanium) System , 1987 .

[26]  L. Toth.  Transition Metal Carbides and Nitrides , 1971 .