Report of Investigations 9406: Vapor-Phase Reactions to Prepare Titanium Nitride Powder

Details

• Journal Article:
  U.S. Bureau of Mines
• Personal Author:
  Slavens, Gregory J.
• Description:
  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 (TiCl4) with anhydrous ammonia (NH3) in the presence of mg at 1,100 deg 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 microm with a standard deviation of 0.09 microm. [Description provided by NIOSH]
• Subjects:
  Chemistry Occupational Health Safety Titanium
• Keywords:
  Tungsten-compounds; Tungsten-minerals; Cutting-oils; Chemical-reactions
• Source:
  USBM 1992 Jun; :1-21
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  Oregon ; OSHA Region 10
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  ALRC - Albany Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  27 pdf pages
• NIOSHTIC Number:
  nn:10011335
• NTIS Accession Number:
  PB92-201060
• CAS Registry Number:
  Ammonia (CAS RN 7664-41-7) ; Magnesium (CAS RN 7439-95-4) ; Magnesium chloride (CAS RN 7786-30-3) ; Titanium tetrachloride (CAS RN 7550-45-0)
• Federal Fiscal Year:
  1992
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:632bb04cde3f47ea4c0893519ecc87f709a74dc6d37cdd6c62752ff23dfc75ce9a5f3c3d5477d0982b57a9274a6c33846221609eccbce48712a6cbd637aadc4d
• Download URL:
  https://stacks.cdc.gov/view/cdc/10277/cdc_10277_DS1.pdf
• File Type:
  [PDF - 4.84 MB ]