Sandvik Intellectual Property Aktiebolag

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Sandvik Intellectual Property Ab

Drexel University

Hans Pettersson

Mats Sundberg

Michel W Barsoum

Tamer El-Raghy

Anders Magnusson

A molybdenum silicide type-heating element and a method of manufacturing a heating element of the molybdenum silicide type. The heating element contains substantially Mo(SiAl)and AlOand is prepared by mixing a molybdenum aluminum silicide-type material Mo(SiAl)with SiO, wherein the SiOhas a purity of at least 98%.

Method of making a heating element of the molybdenum silicide type and a heating element

A method for the production of a heating element that is composed essentially of molybdenum silicide and alloys of that basic material, and a heating element formed from such material. A material is produced that contains substantially Mo(SiAl)and AlOby mixing a molybdenum aluminum silicide Mo(SiAl)with bentonite clay in a known manner. The bentonite clay contains impure or contaminating substances with which molybdenum silicide cannot be alloyed and with which the symmetry of the crystal lattice of the molybdenum silicide is retained with a combined content of less than 2000 ppm.

Method of making a heating element of molybdenum silicide type and a heating element

A process is provided for forming a material comprising an M X Z phase comprising the steps of: (a) providing a mixture of (i) at least one transition metal species, (ii) at least one co-metal species selected from the group consisting of aluminum species, germanium species and silicon species, and (iii) at least one non-metal species selected from the group consisting of boron species, carbon species and nitrogen species; (b) heating said mixture to a temperature of about 1000&deg; C. to about 1800&deg; C., in an atmosphere within a substantially enclosed heating zone, for a time sufficient to form said M X Z phase; wherein the atmosphere has an O partial pressure of no greater than about 1&times;10 atm. The process provides a substantially single phase material comprising very little MZ -phase. A process for preparing a dense, substantially single-phase M X Z phase workpiece includes providing a highly-pure M X Z -phase powder pre-form and sintering said pre-form at a temperature of about 1000&deg; C. to about 1800&deg; C., in an atmosphere within a substantially enclosed heating zone, for a time sufficient to form a dense, substantially single-phase, M X Z -phase workpiece; wherein the atmosphere has an O partial pressure of no greater than about 1&times;10 atm.

Process for forming 312 phase materials and process for sintering the same

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Hallstahammar, Sweden

Hans Pettersson