Synthesis of TiN Nanoparticles by Explosion of Ti Wire in Nitrogen Gas

Kim, Wonbaek; Park, Je-Shin; Suh, Chang–Yul; Cho, Sung-wook; Lee, Sujeong; Shon, In-Jin

doi:10.2320/matertrans.m2009297

Cited by 26 publications

(12 citation statements)

References 18 publications

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“…The measured lattice spacings of faceted precipitates are very close to that of the well-known TiN crystal structure [10], whereas the cubic shaped precipitates showed a slightly larger lattice parameter. These differences may be caused by different N contents [11]. The Ti(N) precipitates were found in random orientations and had no preferred orientation relationship with the surrounding ferrite matrix.…”

Section: Tem Analysismentioning

confidence: 98%

Novel ultrafine Fe(C) precipitates strengthen transformation-induced-plasticity steel

Tirumalasetty

Fang

et al. 2012

Acta Materialia

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A transmission electron microscopy (TEM) study was conducted on nanoprecipitates formed in Ti microalloyed TRIP assisted steels, revealing the presence of Ti(N), Ti 2 CS, and a novel type of ultra-fine Fe(C) precipitates. The matrix/precipitate orientation relationships, sizes and shapes were investigated in detail. The ultrafine, disc-shaped Fe(C) precipitates have sizes of 2-5 nm and possess a hexagonal close packed (hcp) crystal structure with lattice parameters a = 5.73 ± 0.05 Å, c = 12.06 ± 0.05 Å. They are in a well-defined Pitsch Schrader (P-S) orientation relationship with the basal plane of the precipitate parallel to the [110] habit plane of the surrounding body centred cubic (BCC) ferritic matrix. Detailed analysis of precipitate distribution, orientation relationship, lattice mismatch, and inter-particle spacing suggest that these ultrafine precipitates contribute considerably to the strengthening of these steels.

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Section: Tem Analysismentioning

confidence: 98%

Novel ultrafine Fe(C) precipitates strengthen transformation-induced-plasticity steel

Tirumalasetty

Fang

et al. 2012

Acta Materialia

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“…29) We also conducted explosion experiments in Ar gas using the Cr-coated Ti wire which is the same as the one used in this study. 28) We produced -Ti and TiCr 2 nanoparticles which are the equilibrium phases of Ti-Cr alloy of the corresponding composition.…”

Section: Resultsmentioning

confidence: 99%

“…24) We have been demonstrated that electrical wire explosion (EWE) would be a plausible method to synthesize various alloys and intermetallic nanoparticles [25][26][27][28] and also nitride. 29) In this study, we elaborated further to synthesize (Ti,Cr)N nanoparticles by this method.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] More recently, we also reported a successful synthesis of TiN nanoparticles by exploding Ti wire in N 2 gas. 9) Similiarly, (Ti,Cr)N has been studied recently in an effort to modify TiN and been prepared as thin film as a rule. [10][11][12][13][14][15][16][17][18][19][20][21][22][23] However, no efforts have been devoted to synthesize (Ti,Cr)N as particulate form.…”

Section: Introductionmentioning

confidence: 99%

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Electrical Wire Explosion of Cr-Coated Ti Wire in N<SUB>2</SUB> Gas

et al. 2010

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Cr-coated Ti wire was electrically exploded in N 2 gas. The diameter of Ti wire was 0.289 mm and the thickness of Cr coating was 0.033 mm, which corresponds to the average composition of about 25 at% Cr. X-ray diffraction and FE-TEM study revealed that the explosion products consisted of cube-shaped TiN, sphere-shaped Cr 2 N, and clusters of extremely fine particles. The average particle size of TiN and Cr 2 N was about 35 and 38 nanometers, respectively. The size of the fine particles was small as a few nanometers and clustered heavily. Therefore, it was not possible to examine individually. The particles contained about 28 at% Cr. In some part of the high resolution TEM image, cubic structure could be recognized. The lattice parameter of the particles calculated assuming cubic structure was smaller than TiN and larger than CrN. As a result, it was concluded that the fine particles are (Ti,Cr)N.

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“…Recently, we have successfully synthesized nanoparticles of alloys, intermetallics and nitrides by the electrical wire explosion (EWE) process. [7][8][9][10][11] In our previous work, we produced the mixture of -Ti and TiCr 2 particles along with meta-stable Ti-rich phase by exploding a Cr-coated Ti wire in argon. 10) Later on, we produced the mixture of TiN, Cr 2 N, and a few nanometer-sized fine particles, which are presumably (Ti,Cr)N, by exploding a Cr-coated Ti wire in nitrogen.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Titanium-Chromium Nitride by Gas Nitriding of the Explosion Products of Cr-Coated Ti Wire

et al. 2011

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Titanium-chromium nitride nanopowders were prepared by the electrical explosion of the Cr-coated Ti wires in argon and nitrogen gases and subsequent nitriding treatments. The explosion product of the Cr-coated Ti wire in argon gas consisted of -Ti, TiCr 2 and Ti-rich phases. They transformed into single phase (Ti,Cr)N by the nitriding treatment at 1100 C. On the other hand, the explosion product of Cr-coated Ti wire in nitrogen gas consisted of TiN, Cr 2 N, and a few nanometer-sized (Ti,Cr)N particles. The particles transformed into the mixture of TiN and (Ti,Cr)N by the nitriding treatment at 1100 C. In this case, the pre-existing TiN in the explosion product was stable during nitriding and remained intact to coexist with newly-formed (Ti,Cr)N. The (Ti,Cr)N particles prepared by nitriding of the explosion product of Cr-coated Ti wire in nitrogen gas had 34.21 at% Ti, which was somewhat lower than 41.27 at% Ti of the (Ti,Cr)N produced by nitriding of the explosion product of Cr-coated Ti wire in argon gas. This is probably because high thermal stability of the pre-existing TiN in the explosion product of Crcoated Ti wire in nitrogen gas creates a local titanium deficiency in the formation of (Ti,Cr)N particles.

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Synthesis of TiN Nanoparticles by Explosion of Ti Wire in Nitrogen Gas

Cited by 26 publications

References 18 publications

Novel ultrafine Fe(C) precipitates strengthen transformation-induced-plasticity steel

Novel ultrafine Fe(C) precipitates strengthen transformation-induced-plasticity steel

Electrical Wire Explosion of Cr-Coated Ti Wire in N<SUB>2</SUB> Gas

Preparation of Titanium-Chromium Nitride by Gas Nitriding of the Explosion Products of Cr-Coated Ti Wire

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