Roger E Begin, 831550 Cloverleaf Pl, Cumming, GA 30041

5384200, Jan 24, 1995

Apr 18, 1994

8/228929

David C. Giles - West Bloomfield MI
Roger E. Begin - Dearborn MI
David R. Dugger - Howell MI
Eric W. Paskvan - Brighton MI

Detroit Diesel Corporation - Detroit MI

B22F 700

428552

A thermal barrier coating and method of depositing the same on the surfaces of combustion chamber components in compression-ignition internal combustion engines is disclosed. The thermal barrier coating is a dual layer having a first metallic layer comprised of MCrAlY material deposited on the component surface. A porous ceramic layer comprised of Yttria partially stabilized zirconia or Ceria-Yttria partially stabilized zirconia is deposited on the metallic layer to impede the flow of heat therethrough. In operation, the metallic layer creates a mechanical bond between the component surface and the ceramic layer, allows for a smooth transition between the differing physical properties of the component and the ceramic layer and serves as a corrosion barrier by protecting the component from combustion gases and contaminants. There is further disclosed a method of depositing the thermal barrier coating comprising the steps of (1) chemically treating the component surface to remove dirt and oil; (2) grit blasting the treated component surface to roughen the surface and increase the available surface area for deposition; (3) plasma spray depositing a metallic layer comprised of MCrAlY material on the roughened component surface to a thickness between 0. 003-0. 006 inches; and (4) depositing a porous ceramic material comprised of 10%-15% volume porosity Yttria partially stabilized zirconia or 10%-15% volume porosity Ceria-Yttria partially stabilized zirconia on the metallic layer to impede the flow of heat therethrough.

5242510, Sep 7, 1993

Sep 25, 1992

7/951096

Roger E. Begin - Dearborn MI

Detroit Diesel Corporation - Detroit MI

C22C 3710

148321

A moderately high carbon alloy grey iron having a carbon content ranging from 3. 4% to 3. 6% by weight and a primary alloying addition of the combination of molybdenum and copper in amounts by weight ranging from 0. 25% to 0. 40% and from about 0. 30% to 0. 60%, respectively for achieving thermal fatigue resistance and good machinability without adversely affecting chill depth, and with a relatively low silicon content of about 1. 80% to 2. 10%. The alloyed grey iron having the characteristics of: (i) a microstructure of a fully pearlitic matrix having a refined eutectic cell size, and graphite present in substantially uniform distribution and random orientation, the graphite having a flake size of predominantly 5-7 ASTM; (ii) a tensile strength of at least 40,000 psi in the desired section size; (iii) a hardness of about 179 to about 229 Brinell.

6016783, Jan 25, 2000

Dec 28, 1998

9/221492

Roger E. Begin - Dearborn MI

Detriot Diesel Corporation - Detroit MI

F01L 104

1231935

An engine cylinder head can be induction hardened in surface areas contacted by the heads of fastener bolts that are use to fasten the cylinder head to the cylinder block. The hardened surface areas, surrounding the bolt holes, are resistant to fatigue cracking that can otherwise result from thermal and mechanical stresses imposed by the fastener bolt head surfaces.