US 12,110,837 B2
Insulation layer on steel pistons
Norbert G. Schneider, Ann Arbor, MI (US)
Assigned to Tenneco Inc., Lake Forest, IL (US)
Filed by Tenneco Inc., Lake Forest, IL (US)
Filed on Mar. 15, 2019, as Appl. No. 16/354,959.
Application 16/354,959 is a continuation of application No. 15/436,966, filed on Feb. 20, 2017, granted, now 10,273,902.
Claims priority of provisional application 62/298,024, filed on Feb. 22, 2016.
Prior Publication US 2019/0211774 A1, Jul. 11, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. F02F 3/10 (2006.01); C04B 35/48 (2006.01); C04B 35/486 (2006.01); C04B 35/622 (2006.01); C23C 4/02 (2006.01); C23C 4/06 (2016.01); C23C 4/08 (2016.01); C23C 4/11 (2016.01); C23C 4/12 (2016.01); C23C 4/126 (2016.01); C23C 4/129 (2016.01); C23C 4/134 (2016.01); C23C 28/00 (2006.01); F02B 77/02 (2006.01); F02F 3/00 (2006.01); F02F 3/12 (2006.01); F02F 3/26 (2006.01)
CPC F02F 3/10 (2013.01) [C04B 35/48 (2013.01); C04B 35/486 (2013.01); C04B 35/62222 (2013.01); C23C 4/02 (2013.01); C23C 4/06 (2013.01); C23C 4/08 (2013.01); C23C 4/11 (2016.01); C23C 4/12 (2013.01); C23C 4/126 (2016.01); C23C 4/129 (2016.01); C23C 4/134 (2016.01); C23C 28/321 (2013.01); C23C 28/345 (2013.01); C23C 28/3455 (2013.01); C23C 28/36 (2013.01); F02B 77/02 (2013.01); F02F 3/0092 (2013.01); F02F 3/12 (2013.01); F02F 3/26 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/3229 (2013.01); C04B 2235/9607 (2013.01); F02F 2003/0007 (2013.01); F02F 2200/06 (2013.01); F05C 2251/042 (2013.01); F05C 2251/048 (2013.01); F05C 2253/12 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A galleryless piston comprising:
a body portion formed of metal, said body portion including an upper wall including an undercrown surface, said undercrown surface being exposed when viewed from an underside of said piston, said upper wall including an upper combustion surface opposite said undercrown surface, a ring belt depending from said upper wall, a thermal barrier coating applied to at least a portion of said upper combustion surface,
said thermal barrier coating including a ceramic material, and said ceramic material of said thermal barrier coating including at least one of ceria stabilized zirconia and a mixture of ceria stabilized zirconia and yttria stabilized zirconia in an amount of 90 to 100 wt. %, based on the total weight of said ceramic material,
said thermal barrier coating has a metal bond material including a superalloy disposed between said ceramic material and said upper combustion surface,
said thermal barrier coating gradually transitions from 100 wt. % of said metal bond material to 100 wt. % of said ceramic material based on the total weight of said thermal barrier coating,
an uppermost portion of said thermal barrier coating is formed entirely of said ceramic material, and
said thermal barrier layer has a thickness of less than 500 microns.