AN INVESTIGATION OF INTERMETALLIC COMPOUNDS FOR VERY HIGH TEMPERATURE APPLICATIONS

Technical Report · Sun Feb 01 04:00:00 EST 1959

OSTI ID:4164583

Paine, R M; Stonehouse, A J; Beaver, W W

The preparation, fabrication, and properties of intermetallic compcunds under development for service at 2300 to 3000 tained F are described. The compounds, principally beryllides, have exhibited strengths, as measured by the modulus-of-rupture test, of 40,000 psi at 2700 tained F and resistance to oxidation for 100 hours at 2800 tained F and have indicated good thernnal conductivity. The compounds were prepared by solid-stute reactions and fabricated chiefly by hot-pressing techniques. Oxidation tests were made in dry sir at 2500 to 3000 tained F and in moist air (57 tained F dew point) at 2300 to 2500 tained F. Transverse- rupture tests were carried out at 2300, 2500, and 2750 tained F. Room- temperature hardness data and melting points are reported for some compounds. Thermal-expansion and thermal-conductivity data for selected compounds are also presented. The intermetallic compounds included in the investigations were NbAl/ sub 3/, TaAl/sub 3/, CrBe/sub 2/, MoBe/sub 12/, Nb/sub 2/Be/sub 17/, NbBe/sub 12/ , TaBe /sub 2/, Ta/sub 2/Be/sub 3/ TaBe/sub 12/, TiBe/sub 2/, TiBe/sub 12/, ZrBe/ sub 13/, Cr/sub 3/Si, Ti/sub 5/Si/ sub 3/, TiSi, and TiSi/sub 2/, with CrBe/sub 2/ , TaBe/sub 2/, TiBe/sub 2/, and the silicides recei ving only a very limited effort (chiefly oxidation tests). The more promising intermetallic compounds for hightemperature applications are concluded to be ZrBe/sub 13/' Nb/sub 2/Be/sub 17/ , NbBe/sub 12/, Ta/sub 2/Be/sub 17/, and TaBe/sub 12/. (auth)

• Research Organization: Brush Beryllium Co., Cleveland
• NSA Number: NSA-14-019442
• OSTI ID: 4164583
• Report Number(s): WADC-TR-59-29(Pt.II)
• Country of Publication: United States
• Language: English

Related Subjects

AIR
ALUMINUM ALLOYS
BERYLLIUM ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
EFFICIENCY
EXPANSION
FABRICATION
FAILURES
HARDNESS
HIGH TEMPERATURE
HOT WORKING
HUMIDITY
INTERMETALLIC COMPOUNDS
MATERIALS TESTING
MEASURED VALUES
MECHANICAL PROPERTIES
MELTING POINTS
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
OXIDATION
PREPARATION
PRESSURE
SILICIDES
SOLIDS
STABILITY
TANTALUM ALLOYS
TEMPERATURE
TENSILE PROPERTIES
THERMAL CONDUCTIVITY
TITANIUM ALLOYS
USES
ZIRCONIUM ALLOYS