RICHARD A ALLIEGRO
Engineering in Holden, MA
License number
Massachusetts 17596
Expiration Date
Jun 30, 1984
Type
Ceramic Engineer
Address
Address
Holden, MA 01520
Personal information
See more information about RICHARD A ALLIEGRO at radaris.comName
Address
Phone
26 Woodstone Rd, Northborough, MA 01532
4 Whittier Rd, East Falmouth, MA 02536
6 Pine Crest Dr, Worcester, MA 01604
3 Union Rd, Holland, MA 01521
26 Dustin St, Worcester, MA 01604
Professional information
See more information about RICHARD A ALLIEGRO at trustoria.com
Hot-Pressing Of Shapes Of Non-Uniform Cross-Sectional Thickness
Hot-Pressing Of Shapes Of Non-Uniform Cross-Sectional Thickness
US Patent:
4153666, May 8, 1979
Filed:
Feb 12, 1974
Appl. No.:
5/441737
Inventors:
Richard A. Alliegro - Holden MA
Assignee:
Norton Company - Worcester MA
International Classification:
B29C 300
US Classification:
264325
Abstract:
Uniaxial hot-pressing of ceramic powders to produce monolithic shapes of non-uniform thickness is accomplished by employing a form, preformed to a shape which when properly oriented and uniaxially compressed to final density will deform orderly to assume the final desired shape, and hot-pressing it in a mold against preformed parts having surfaces exactly mating with the surfaces of the preform. Such mold parts have the same compaction ratio as the preform, and a coefficient of thermal expansion substantially equal to that of the preform, and are formed of a powdered composition which is non-reactive with the preform material under hot-pressing conditions. Suitable compositions for the mold part preforms are temporarily bonded mixtures of carbon or graphite powder and a powder material of the preform. The shapes may be slip cast or cold pressed and temporary binders of organic or inorganic material may be employed to give green strength to the parts.
Silicon Carbide Diffusion Furnace Components
Silicon Carbide Diffusion Furnace Components
US Patent:
3951587, Apr 20, 1976
Filed:
Dec 6, 1974
Appl. No.:
5/530083
Inventors:
Richard A. Alliegro - Holden MA
Samuel H. Coes - Northborough MA
Samuel H. Coes - Northborough MA
Assignee:
Norton Company - Worcester MA
International Classification:
F27B 506
US Classification:
432253
Abstract:
Process tube, paddle, and boat for a semi-conductor diffusion furnace composed of a matrix of high purity sintered silicon carbide which is made impervious to gases by impregnation thereof with silicon metal which is 99. 9% pure. The process tube, paddle and boat provide the ultra pure environment needed for semi-conductor production and are highly resistant to the degradative effect of a great number of high temperature heating cycles.
Refractory Ramming Mix Containing Aluminum Powder For Metal Melting Furnaces
Refractory Ramming Mix Containing Aluminum Powder For Metal Melting Furnaces
US Patent:
4222782, Sep 16, 1980
Filed:
Sep 4, 1979
Appl. No.:
6/072008
Inventors:
Richard A. Alliegro - Holden MA
Ronald A. Stark - Hubbardston MA
Ronald A. Stark - Hubbardston MA
Assignee:
Norton Company - Worcester MA
International Classification:
C04B 3504
US Classification:
106 57
Abstract:
A refractory ramming mix for forming linings for containers of molten metal contains graded refractory grains size to minimize porosity, optional sintering aids or fluxes, and aluminum powder in the amount of 1 to 15% by volume.
Armor Structure And Method Of Producing Ceramic Armor
Armor Structure And Method Of Producing Ceramic Armor
US Patent:
4138456, Feb 6, 1979
Filed:
Oct 24, 1967
Appl. No.:
4/677737
Inventors:
Richard A. Alliegro - Holden MA
Assignee:
Norton Company - Worcester MA
International Classification:
C04B 3564
US Classification:
264 65
Abstract:
A process for simultaneously upgrading arc furnace crude production of titanium diboride, titanium carbide and mixtures thereof by reacting the carbon present therein with boron trioxide and titanium oxide or with titanium dioxide alone while simultaneously hot pressing the reactants whereby to densify the resulting plate to maximize its modulus of elasticity and modulus of rupture for use in armor constructions, to form a hard ceramic plate adapted to be integrated with a fiber glass layer in the fabrication of armor.