摘要:
An article including a monolithic crucible body comprising silicon oxynitride (SixNyO, wherein x>0 and y>0), wherein the silicon oxynitride extends throughout the entire volume of the monolithic crucible body.
摘要:
An article including a monolithic crucible body comprising silicon oxynitride (SixNyO, wherein x>0 and y>0), wherein the silicon oxynitride extends throughout the entire volume of the monolithic crucible body.
摘要:
A composite article having a body including a first phase that includes a nitride material, a second phase that includes a carbide material, and a third phase having one of an amorphous phase material with a nitrogen content of at least about 1.6 wt % or an amorphous phase material comprising carbon.
摘要:
A composite article having a body including a first phase that includes a nitride material, a second phase that includes a carbide material, and a third phase having one of an amorphous phase material with a nitrogen content of at least about 1.6 wt % or an amorphous phase material comprising carbon.
摘要:
A pipe choke for use in drilling and mining operations comprising a body including a first end and a second end configured to couple to a pipe, an opening extending through the body from the first end to the second end, and wherein the body includes a first phase comprising recrystallized silicon carbide and a second phase comprising silicon.
摘要:
A pipe choke for use in drilling and mining operations comprising a body including a first end and a second end configured to couple to a pipe, an opening extending through the body from the first end to the second end, and wherein the body includes a first phase comprising recrystallized silicon carbide and a second phase comprising silicon.
摘要:
A composite article including a body made of recrystallized silicon carbide and an infiltrant, wherein the body comprises a static impact resistance of at least about 1800 MPa.
摘要:
A composite article including a body made of recrystallized silicon carbide and an infiltrant, wherein the body comprises a static impact resistance of at least about 1800 MPa.
摘要:
An electrostatic dissipative (ESD) article includes a body having a volume resistivity within a range between about 104 ohm-cm and about 1010 ohm-cm as measured at 23° C. and 500 V. The body also has a first phase including a nitride, a second phase including a carbide, and a third phase including an oxide material.
摘要:
A method of producing aluminum, comprising the steps of:a) providing an aluminum reduction Hall cell for reduction of alumina in molten fluoride electrolyte containing cryolite, the cell comprising a cathode, an anode and a sidewall, the sidewall having a thickness and comprising:i) a lining consisting essentially of a material selected from the group consisting of silicon nitride, silicon carbide, and boron carbide, and having a density of at least 95% of theoretical density, and no apparent porosity, andii) an insulating layer backing the lining,b) contacting the lining with an electrolyte comprising at least 60% cryolite and having a temperature of between 650.degree. C. and 1100.degree. C., andc) providing an electric current from the cathode to the anode through the electrolyte, thereby producing aluminum at the cathode, wherein the electrolyte temperature, the cryolite concentration and the thickness of the sidewall are predetermined so that the cryolite does not form a frozen crust anywhere on the lining.