Dispersion strengthened molybdenum

Claim 1

A METHOD OF PRODUCING BY INTERNAL OXIDATION A DISPERSION STRENGHTENED WROUGHT METAL PRODUCT FRM A MATRIX METAL SELCTED FROM THE GROUP CONSISTING OF NO, AND W AND MOLYBDENUM-BASE AND TUNGSTEN-BASE ALLOYS CONTAINING AN ALLOYING CONSTITUENT IN AN AMOUNT RANGING UP TO THE SOLID SLUTION LIMIT OF THE RESPECTIVE PHASE DIAGRAM BUT NOT EXCEEDING 20% BY WEIGHT OF THE ALLOY AND CAPABLE OF FORMING A STABLE OXIDE BUT WHICH HAS A NORMAL PROPENSITY OF FORMING AN UNSTABLE OXIDE WHEN HEATED UNDER OXIDIZING CONDITIONS TO AN ELEVATED TEMPERATURE WHICH COMPRISES, PROVIDING A SOLID STOCK OF SAID MATRIX METAL CONTAINING SOLUTE METAL RANGING IN AN AMOUNT CORRESPONDING UP TO ABOUT 10 V./O IF SOLUTE METAL OXIDE EQUIVALENT WHOSE NEGATIVE FREE ENERGY OF FORMATION AT 25*C. IS AT LEAST ABOUT 85,000 CALORIES PER GRAM ATOM OF OXYGEN, COMMINUTING BY MECHANICALLY REDUCING SAID SOLID STOCK IN AN OXYGEN-CONTAINING ATMOSPHERE, WHEREBY AND OXIDE FILM IS PROVIDED ON THE COMMINUTED MATRIX METAL OBTAINED, SUBJECTING THE PARTICLE MATRIX METAL TO THERMAL TREATMENT AT AN ELEVATED TEMPERATURE UNDER SUBSTANTIALLY NON-OXIDIZING CONDITIONS SUFFICIENT TO PROMOTE THE INTERNAL OXIDATION OF SAID MATRIX METAL, WHEREBY ITS SUFACE IOXIDE IS CONVERTED TO AN INTERNAL DISPERSION OF SOLUTE METAL OXIDE AND THEN HOT WORKING SAID THERMALLY TREATED MATRIX METAL UNDER SUBSTANTIALLY NON-OXIDIZING CONDITIONS INTO A WROUGHT METAL SHAPE, WHEREBY SAID MATRIX METAL IS CHARACTERIZED BY IMPROVED HIGH TEMPERATURE STRENGTH PROPERTIES.

Claim 2

A METHOD OF PRODUCING BY INTERNAL OXIDATION A DISPERSION STRENGHTENED WROUGHT METAL PRODUCT FRM A MATRIX METAL SELCTED FROM THE GROUP CONSISTING OF NO, AND W AND MOLYBDENUM-BASE AND TUNGSTEN-BASE ALLOYS CONTAINING AN ALLOYING CONSTITUENT IN AN AMOUNT RANGING UP TO THE SOLID SLUTION LIMIT OF THE RESPECTIVE PHASE DIAGRAM BUT NOT EXCEEDING 20% BY WEIGHT OF THE ALLOY AND CAPABLE OF FORMING A STABLE OXIDE BUT WHICH HAS A NORMAL PROPENSITY OF FORMING AN UNSTABLE OXIDE WHEN HEATED UNDER OXIDIZING CONDITIONS TO AN ELEVATED TEMPERATURE WHICH COMPRISES, PROVIDING A SOLID STOCK OF SAID MATRIX METAL CONTAINING SOLUTE METAL RANGING IN AN AMOUNT CORRESPONDING UP TO ABOUT 10 V./O IF SOLUTE METAL OXIDE EQUIVALENT WHOSE NEGATIVE FREE ENERGY OF FORMATION AT 25*C. IS AT LEAST ABOUT 85,000 CALORIES PER GRAM ATOM OF OXYGEN, COMMINUTING BY MECHANICALLY REDUCING SAID SOLID STOCK IN AN OXYGEN-CONTAINING ATMOSPHERE, WHEREBY AND OXIDE FILM IS PROVIDED ON THE COMMINUTED MATRIX METAL OBTAINED, SUBJECTING THE PARTICLE MATRIX METAL TO THERMAL TREATMENT AT AN ELEVATED TEMPERATURE UNDER SUBSTANTIALLY NON-OXIDIZING CONDITIONS SUFFICIENT TO PROMOTE THE INTERNAL OXIDATION OF SAID MATRIX METAL, WHEREBY ITS SUFACE IOXIDE IS CONVERTED TO AN INTERNAL DISPERSION OF SOLUTE METAL OXIDE AND THEN HOT WORKING SAID THERMALLY TREATED MATRIX METAL UNDER SUBSTANTIALLY NON-OXIDIZING CONDITIONS INTO A WROUGHT METAL SHAPE, WHEREBY SAID MATRIX METAL IS CHARACTERIZED BY IMPROVED HIGH TEMPERATURE STRENGTH PROPERTIES.