Glassimetal Technology Inc.

Apple Inc.

California Institute of Technology

Glassimental Technology, Inc.

Divx, LLC

Sonic Ip, Inc.

Michael Floyd

William L Johnson

Jason A Braness

Kourosh Soroushian

Marios D Demetriou

William T Frantz

Jong Hyun Na

Roland Osborne

Shaiwal Priyadarshi

Glenn Garrett

Danielle Duggins

Maximilien E Launey

David S Lee

Jerome Vashisht-Rota

Xiao Liu

Dan Salmonsen

John Funnell

Nickel based alloys capable of forming bulk metallic glass are provided. The alloys include Ni&#x2014;Cr&#x2014;Si&#x2014;B compositions, with additions of P and Mo, and are capable of forming a metallic glass rod having a diameter of at least 1 mm. In one example of the present disclosure, the Ni&#x2014;Cr&#x2014;Mo&#x2014;Si&#x2014;B&#x2014;P composition includes about 4.5 to 5 atomic percent of Cr, about 0.5 to 1 atomic percent of Mo, about 5.75 atomic percent of Si, about 11.75 atomic percent of B, about 5 atomic percent of P, and the balance is Ni, and wherein the critical metallic glass rod diameter is between 2.5 and 3 mm and the notch toughness between 55 and 65 MPa m.

Bulk nickel-silicon-boron glasses bearing chromium

A fluxing method is disclosed by which the melt of aluminum-contaminated Ni-based glass-forming alloys is fluxed using a fluxing agent based on boron and oxygen in order to reverse the adverse effects of aluminum impurities on the glass-forming ability and toughness.

Fluxing method to reverse the adverse effects of aluminum impurities in nickel-based glass-forming alloys

The disclosure is directed to Ni&#x2014;Cr&#x2014;P eutectic alloys bearing Nb as substitution for Cr that are capable of forming metallic glasses with critical rod diameter of at least 1 mm or more. With further minority addition of Si as replacement for P, such alloys are capable of forming metallic glasses with critical rod diameters as high as 10 mm or more. Specifically, Ni-based compositions with a Cr content of between 5 and 14 atomic percent, Nb content of between 3 and 4 atomic percent, P content of between 17.5 and 19 atomic percent, and Si content of between 1 and 2 atomic percent, were capable of forming bulk metallic glass rods with diameters as large as 6 mm or larger.

Bulk nickel-based glasses bearing chromium, niobium, phosphorus and silicon

A Ni-based bulk metallic glass forming alloy is provided. The alloy includes NiCrNbPB, where an atomic percent of chromium (Cr) a ranges from 3 to 13, an atomic percent of niobium (Nb) b is determined by x&#x2212;y*a, where x ranges from 3.8 to 4.2 and y ranges from 0.11 to 0.14, an atomic percent of phosphorus (P) c ranges from 16.25 to 17, an atomic percent of boron (B) d ranges from 2.75 to 3.5, and the balance is nickel (Ni), and where the alloy is capable of forming a metallic glass object having a lateral dimension of at least 6 mm, where the metallic glass has a stress intensity factor at crack initiation when measured on a 3 mm diameter rod containing a notch with length between 1 and 2 mm and root radius between 0.1 and 0.15 mm, the stress intensity factor being at least 70 MPa m.

Bulk nickel-based chromium and phosphorus bearing metallic glasses with high toughness

The present disclosure is directed to Ni&#x2014;P&#x2014;B alloys and glasses containing small fractions of Nb and Ta and optionally Mn. Over a specific range, the alloys are capable of forming bulk metallic glasses having critical casting thickness in excess of 1 mm. In one embodiment, compositions with a Mn content of between 3 and 4 atomic percent, Nb content of about 3 atomic percent, B content of about 3 atomic percent, and P content of about 16.5 atomic percent, where the balance in Ni, were capable of forming bulk metallic glass rods with diameters as large as 5 mm or larger. In another embodiment, Ni-based compositions with a Mn content of between 5 and 7 atomic percent, Ta content of between 1 and 2 atomic percent, B content of about 3 atomic percent, and P content of about 16.5 atomic percent, where the balance in Ni, were capable of forming bulk metallic glass rods with diameters as large as 5 mm or larger.

Bulk nickel-phosphorus-boron glasses bearing manganese, niobium and tantalum

The disclosure is directed to Ni-based glass-forming alloys bearing Cr and P, wherein the Cr atomic concentration is greater than 7 percent and the P atomic concentration is greater than 12 percent, and methods of fluxing such alloys such that their glass-forming ability is enhanced with respect to the glass-forming ability associated with their unfluxed state.

Fluxing methods for nickel based chromium and phosphorus bearing alloys to improve glass forming ability

The disclosure is directed to Ni&#x2014;P&#x2014;B alloys bearing Mn and optionally Cr and Mo that are capable of forming a metallic glass, and more particularly metallic glass rods with diameters at least 1 mm and as large as 5 mm or larger. The disclosure is further directed to Ni&#x2014;Mn&#x2014;Cr&#x2014;Mo&#x2014;P&#x2014;B alloys capable of demonstrating a good combination of glass forming ability, strength, toughness, bending ductility, and corrosion resistance.

Bulk nickel-phosphorus-boron glasses bearing manganese

Ferrous metal alloys including Fe, Co and optionally Ni with metalloids Si, B and P are provided that are substantially close to the peak in glass forming ability and have a combination of both good glass formability and good ferromagnetic properties. In particular, Fe/Co-based compositions wherein the Co content is between 15 and 30 atomic percent and the metalloid content is between 22 and 24 atomic percent at a well-defined metalloid moiety, have been shown to be capable of forming bulk glassy rods with diameters as large as 4 mm or larger. In addition, incorporating a small content of Ni under 10 atomic percent and additions of Mo, Cr, Nb, Ge, or C at an incidental impurity level of up to 2 atomic percent are not expected to impair the bulk-glass-forming ability of the present alloys.

Bulk ferromagnetic glasses free of non-ferrous transition metals

The present disclosure provides specified ranges in the Fe&#x2014;Mo&#x2014;Ni&#x2014;Cr&#x2014;P&#x2014;C&#x2014;B alloys such that the alloys are capable of forming bulk glasses having unexpectedly high glass-forming ability. The critical rod diameter of the disclosed alloys is at least 10 mm.

Bulk glass steel with high glass forming ability

A bulk-glass forming Ni&#x2014;Cr&#x2014;Nb&#x2014;P&#x2014;B alloy is provided. The alloy includes NiCrTaPB, where the atomic percent a is between 3 and 11, the atomic percent b is between 1.75 and 4, the atomic percent c is between 14 and 17.5, and the atomic percent d is between 2.5 and 5. The alloy is capable of forming a metallic glass having a lateral dimension of at least 3 mm.

Bulk nickel-phosphorus-boron glasses bearing chromium and tantalum

Ni&#x2014;Fe&#x2014;Si&#x2014;B and Ni&#x2014;Fe&#x2014;Si&#x2014;B&#x2014;P metallic glass forming alloys and metallic glasses are provided. Metallic glass rods with diameters of at least one, up to three millimeters, or more can be formed from the disclosed alloys. The disclosed metallic glasses demonstrate high yield strength combined with high corrosion resistance, while for a relatively high Fe contents the metallic glasses are ferromagnetic.

Bulk nickel&#x2014;silicon&#x2014;boron glasses bearing iron

An alloy comprising Fe, Ni, P, B and Ge is disclosed, having a composition according to the formula [FeNi]PBGe, where a, b, c subscripts denote atomic percent; y subscript denotes atomic fraction, a is between 9 and 12, b is between 5.5 and 7.5, c is between 2 and 6, and y is between 0.45 and 0.55. Metallic glass rods with diameter of at least 1 mm can be formed from the alloy by rapid quenching from the molten state.

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Pasadena, CA, United States of America

Michael Floyd