CEMENTED METALLIC BORIDES. Final Summary Report for September 1, 1956- December 31, 1957

Technical Report · Sat Mar 01 00:00:00 EST 1958

OSTI ID:4327300

As the impact strength of Borolite IV (Cr/sub 2/Bchromium --molybdenum alloy) was not improved by the addition of small amounts of other metals, emphasis was placed on the purification by direct reaction in vacuum and sintering in vacuum. No appreciable improvement of the impact strength was found. The physical properties and microstructure of the pure- Borolite ly were investigated, and the results are tabulated. The breaking strength of hard metals, especially boride-base materials, was investigated at high temperatures, usually well above 1000 The transverse rupture strengths of Borolite IV, Borolite III, chromium --20% molybdenum alloy, molybdenum disiliclde, CrB, Cr/sub 2/B, titanium diboride, vanadium diboride, zirconium diboride, and zirconium carbide were determined as a function of temperature. Borides of lanthanum, europium, gadolinium, dysprosium, and neodymium and a ternary gadolinium nickel boride were prepared and the lattice constants determined. (J.S.R.)

• Research Organization: Firth Sterling, Inc. American Electro Metal Div., Yonkers, N.Y.
• DOE Contract Number: NONR-2218(00)
• NSA Number: NSA-12-009804
• OSTI ID: 4327300
• Report Number(s): NP-6704
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-58
• Country of Publication: United States
• Language: English

Related Subjects

MINERALOGY, METALLURGY, AND CERAMICS
CHROMIUM ALLOYS
CHROMIUM BORIDES
DYSPROSIUM BORIDES
EUROPIUM BORIDES
GADOLINIUM BORIDES
HIGH TEMPERATURE
IMPACT SHOCK
IMPURITIES
LANTHANUM BORIDES
LATTICES
METALLOGRAPHY
MOLYBDENUM ALLOYS
MOLYBDENUM COMPOUNDS
NEODYMIUM BORIDES
NICKEL BORIDES
PREPARATION
SILICIDES
SINTERING
TEMPERATURE
TENSILE PROPERTIES
TITANIUM BORIDES
VACUUM
VANADIUM BORIDES
ZIRCONIUM BORIDES
ZIRCONIUM CARBIDES