EVALUATION OF BERYLLIDES

Journal Article · Mon May 01 04:00:00 EDT 1961 · J. Metals

OSTI ID:4009144

Lewis, J R

and the transition metals are hard, toxic, low density materials with good-to-excellent oxidation resistance and attractive nuclear properties. An evaluation of the properties is presented. The beryllides are quite brittle at temperatures approaching 2000 deg F and several exist whose melting point lies above 3000 deg F, although none are known which melt above 3700 deg F. They retain their mechanical strength to rather high temperatures --- Zr/sub 2/Be/sub 1//sub 7/ has a rupture modulus of 24,000 psi at 2750 deg F. Because the protective oxide which forms upon exposure to air is BeO, the beryllides need protection against water vapor attack. Plastic slip deformation is observed to a slight degree above 2500 deg F in the MoBe/sub 1//sub 2/ type. ZrBe/sub 1//sub 3/ is extruded using molybdenum cans and extrusion temperatures about 80% of the absolute melting point. Thermal shock resistance is equal to that of some ceramic materials and inferior to graphite and fused quartz. (N.W.R.)

• Research Organization: General Electric Co., Schenectady, N.Y.
• NSA Number: NSA-15-018544
• OSTI ID: 4009144
• Journal Information: J. Metals, Journal Name: J. Metals Vol. Vol: 13
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
BERYLLIUM ALLOYS
BERYLLIUM OXIDES
BRITTLENESS
CORROSION PROTECTION
DEFORMATION
DENSITY
DIES
EXTRUSION
FAILURES
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
MELTING POINTS
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM
MOLYBDENUM ALLOYS
OXIDATION
SLIP
STABILITY
THERMAL STRESSES
TOXICITY
TRANSITION METALS
VAPORS
WATER
ZIRCONIUM ALLOYS