PHYSICAL PROPERTIES OF TITANIUM NITRIDE IN THE HOMOGENEITY REGION

Journal Article · Thu May 11 00:00:00 EDT 1961 · Doklady Akad. Nauk S.S.S.R.

OSTI ID:4020181

Samsonov, G V; Verkhoglyadova, T S

Changes in chemical bonding, and hence in physical properties, can be expected in homogenecus alloys of TiN containing 35 to 50 at.% of nitrogen (TiN/ sub 0.5//sub 4/ to TiN/sub 0. / 9>i/sub 8/). Microhardness tests were run on powder alloys prepared by nitriding powder Ti in a non-oxidizing atmosphere. Electrical resistance measurements were made on sintered briquets which had been subject to a pressure of 2 to 4 tons/cm/sup 2/ in a nitrogen atmosphere for 2 te 4 hours at temperatures of 900 to 1300 deg C. The microhardness increases linearly with increasing nitrogen content of the alloy anaogously to the behavior of such carbides as TiC, ZrC, and also Ta/sub 2/C and TaC. There is a linear increase in electrical resistance with increasing temperature for the TiN sample containing 49.8 at.% N. On decreasing the nitrogen content to 48.4 at.% N, a maximum in the electrical resistance is found at 1800 deg C. With a further decresse in the nitrogen content, the electrical resistance increases, and the maximum is shifted toward lower temperatures (750 deg C for the sample containing 43.4 at.% N, and 550 deg C for the sample containing 38.6 at.% N). These effects can be explained on the assumption of an increase in ionic bonding in the alloy with a decrease in nitrogen content. These effects should be expected for the nitrides of other transition metals such as Zr, Hf, and V, sed also for Nb, Ta, W, and Mo. (TTT)

• Research Organization: Inst. of Metallo-Ceramics and Special Alloys, Academy of Sciences, Ukrainian SSR
• NSA Number: NSA-15-025243
• OSTI ID: 4020181
• Journal Information: Doklady Akad. Nauk S.S.S.R., Vol. Vol: 138; Other Information: Orig. Receipt Date: 31-DEC-61
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

METALS, CERAMICS, AND OTHER MATERIALS
ELECTRIC CONDUCTIVITY
HAFNIUM NITRIDES
HARDNESS
HIGH TEMPERATURE
HOMOGENEOUS REACTORS
INERT GASES
MOLYBDENUM NITRIDES
NIOBIUM NITRIDES
NITROGEN
POWDERS
PREPARATION
PRESSURE
SINTERED MATERIALS
TANTALUM CARBIDES
TANTALUM NITRIDES
TITANIUM
TITANIUM CARBIDES
TITANIUM NITRIDES
TRANSITION METALS
TUNGSTEN NITRIDES
VANADIUM NITRIDES
ZIRCONIUM CARBIDES
ZIRCONIUM NITRIDES