Publication number: 20210347699
Abstract: A thermal barrier coating (TBC) top coat which is a high entropy oxide (HEO) having a high configurational entropy, contains at least 5 different oxide-forming metallic cations, is a single phase or single crystalline structure, such as tetragonal or cubic over unexpectedly wide temperature ranges up to and beyond top coat operating temperatures of preferably at least 2300° F. The TBC top coats exhibit low thermal conductivity, good sintering resistance, excellent phase stability and good thermal cycling performance. At least five of the different oxide-forming metallic cations include: a) at least one of the transition metals: Sc, Y, Ti, Zr, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Ru, Co, Ni, Cu, or Zn, and/or at least one of the lanthanides La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb. Dy, Ho, Er, Yb, or Lu. One of the at least five different oxide-forming metallic cations may also comprise at least one of the alkaline-earth metals: Be, Mg, Ca, Sr, or Ba.
Type:
Application
Filed:
October 9, 2019
Publication date:
November 11, 2021
Applicant:
OERLIKON METCO (US) INC.
Inventors:
Jianhong HE, Heidi Lynette LOVELOCK, Naixie ZHOU, Tyler HARRINGTON, Timothy SHAROBEM
Patent number: 10940565
Abstract: A braze alloy composition includes the formula: NiaFebPcBdSieCfXg wherein X is selected from the group consisting of Cu, Nb, Hf, Mo, W, V, Ta, Y, La, rare earth elements, Al, Ru, Pd, Cr, Mn, Co, Be, and mixtures thereof, a, b, c, d, e, f, and g are atom % of, respectively, Ni, Fe, P, B, Si, C, and X, and wherein 75?((a+b)?g)?90, a>b, 10?c+d+e+f?25, and g<10.
Type:
Grant
Filed:
February 23, 2015
Date of Patent:
March 9, 2021
Assignee:
OERLIKON METCO (US) INC.
Inventors:
Dongmyoung Lee, Gerhard E. Welsch