Coating of metals with titanium diboride by chemical vapor deposition

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:7094955

Pierson, H. O.; Randich, E.

This study is an experimental investigation of the chemical vapor deposition of titanium diboride on metallic substrates by the hydrogen reduction of TiCl/sub 4/ and BCl/sub 3/ at temperatures between 850/sup 0/C and 1100/sup 0/C. Kovar, tantalum, and several stainless steels were found to be suitable substrates since they could withstand the deposition temperature, had adequate resistance to HCl, a by-product of the deposition reaction, and had thermal expansion coefficients sufficiently close to that of TiB/sub 2/ (less than or equal to10 x 10/sup -6///sup 0/C). The TiB/sub 2/ coatings produced were 68.2% Ti and thus near stoichiometry and had very low impurity content. They had Knoop hardnesses averaging 3300 kg/mm/sup 2/ and exhibited extraordinary erosion resistance.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 7094955
• Report Number(s): SAND-77-0363C; CONF-771004-3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALLOYS
BORIDES
BORON COMPOUNDS
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
CHROMIUM ALLOYS
COATINGS
COBALT ALLOYS
CORROSION RESISTANT ALLOYS
DEPOSITION
ELEMENTS
IRON ALLOYS
IRON BASE ALLOYS
KOVAR
MANGANESE ADDITIONS
MANGANESE ALLOYS
METALS
NICKEL ALLOYS
PROTECTIVE COATINGS
REFRACTORY METALS
STAINLESS STEELS
STEELS
SURFACE COATING
TANTALUM
TITANIUM BORIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE