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Vapor-Phase Reactions to Prepare Titanium Nitride Powder.

PB92201060

Publication Date	1992
Personal Author	Slavens, G. J.
Page Count	30
Abstract	The U.S. Bureau of Mines conducted research on preparing submicrometer titanium nitride (TiN) powder as a substitute for tungsten carbide in cutting tools and wear-resistant parts. Earlier research on a small scale was expanded to include a larger reactor. The TiN powder was produced by contacting titanium tetrachloride with anhydrous ammonia in the presence of Mg at 1,100 C. The powder was collected in an electrostatic precipitator (ESP) filled with ultra-high-purity (UHP) Ar. All collected powder was thermal vacuum distilled to remove Mg and magnesium chloride (MgCl2), leaving the purified TiN. Powder handling and purification procedures were conducted to assure low oxygen content in the powder product. Oxygen content in the distilled TiN powder product was as low as 0.40 wt pct. Nitrogen averaged near 22.0 wt pct with a high of 22.4 wt pct. The purified powder product had an average median particle diameter of 0.14 micrometer with a standard deviation of 0.09 micrometer.
Keywords	Titanium nitrides Chemical preparation Powder(Particles) Chemical reactions Materials replacement Tungsten carbides Cutting tools
Source Agency	Bureau of Mines
NTIS Subject Category	99D - Basic & Synthetic Chemistry
Corporate Authors	Bureau of Mines, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	199219

Vapor-Phase Reactions to Prepare Titanium Nitride Powder.

Vapor-Phase Reactions to Prepare Titanium Nitride Powder.
PB92201060

Publication Date	1992
Personal Author	Slavens, G. J.
Page Count	30
Abstract	The U.S. Bureau of Mines conducted research on preparing submicrometer titanium nitride (TiN) powder as a substitute for tungsten carbide in cutting tools and wear-resistant parts. Earlier research on a small scale was expanded to include a larger reactor. The TiN powder was produced by contacting titanium tetrachloride with anhydrous ammonia in the presence of Mg at 1,100 C. The powder was collected in an electrostatic precipitator (ESP) filled with ultra-high-purity (UHP) Ar. All collected powder was thermal vacuum distilled to remove Mg and magnesium chloride (MgCl2), leaving the purified TiN. Powder handling and purification procedures were conducted to assure low oxygen content in the powder product. Oxygen content in the distilled TiN powder product was as low as 0.40 wt pct. Nitrogen averaged near 22.0 wt pct with a high of 22.4 wt pct. The purified powder product had an average median particle diameter of 0.14 micrometer with a standard deviation of 0.09 micrometer.
Keywords	Titanium nitrides Chemical preparation Powder(Particles) Chemical reactions Materials replacement Tungsten carbides Cutting tools
Source Agency	Bureau of Mines
NTIS Subject Category	99D - Basic & Synthetic Chemistry
Corporate Authors	Bureau of Mines, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	199219