Surface Engineering of Annealed High Entropy Alloys Towards Thermodynamically Stable, Anti-Oxidation, Solar Selective Absorbers

Authors

Sheppard R. SomersFollow

Degree Program

A.B.

Year of Graduation

2019

Faculty Advisor

Jifeng Liu

Document Type

Thesis (Senior Honors)

Publication Date

6-2019

Abstract

Concentrating solar power (CSP) systems require receivers that maintain their physical properties at the high operating temperature and are absorbent. The high entropy alloy Fe28.2Ni18.8Mn32.9Al14.1Cr6 (HEA) investigated in this thesis fills these needs by harnessing the HEA’s oxidation process to create a selective solar absorbing layer that grows at a parabolic rate at CSP operating temperatures. Results of this research demonstrate that annealing processes of HEA can yield over 90% solar thermal efficiency by engineering the surface oxidation to be both physically and optically optimized for absorption.

Dartmouth Digital Commons Citation

Somers, Sheppard R., "Surface Engineering of Annealed High Entropy Alloys Towards Thermodynamically Stable, Anti-Oxidation, Solar Selective Absorbers" (2019). ENGS 88 Honors Thesis (AB Students). 1.
https://digitalcommons.dartmouth.edu/engs88/1