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Title: Fatigue-resistant high-performance elastocaloric materials made by additive manufacturing

Journal Article · · Science
ORCiD logo [1];  [2]; ORCiD logo [2];  [3];  [4]; ORCiD logo [3]; ORCiD logo [5];  [5]; ORCiD logo [2]; ORCiD logo [5]; ORCiD logo [5];  [6]; ORCiD logo [6]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [6]; ORCiD logo [5]
  1. Univ. of Maryland, College Park, MD (United States); Beihang Univ., Beijing (China)
  2. Ames Lab., Ames, IA (United States)
  3. Colorado School of Mines, Golden, CO (United States)
  4. Xi’an Jiaotong Univ. (China)
  5. Univ. of Maryland, College Park, MD (United States)
  6. Ames Lab., and Iowa State Univ., Ames, IA (United States)

Elastocaloric cooling, a solid-state cooling technology, displays the latent heat released and absorbed by stress-induced phase transformations. Hysteresis associated with transformation, however, is detrimental to efficient energy conversion and functional durability. Here, we have created thermodynamically efficient, low-hysteresis elastocaloric cooling materials by means of additive manufacturing of nickel-titanium. The utilization of a localized molten environment and near-eutectic mixing of elemental powders has led to the formation of nanocomposite microstructures composed of a nickel-rich intermetallic compound interspersed among a binary alloy matrix. The microstructure allowed extremely small hysteresis in quasi-linear stress-strain behaviors—enhancing the materials efficiency by a factor of four to seven—and repeatable elastocaloric performance over 1 million cycles. Implementing additive manufacturing to elastocaloric cooling materials enables distinct microstructure control of high-performance metallic refrigerants with long fatigue life.

Research Organization:
Univ. of Maryland, College Park, MD (United States); Ames Laboratory (AMES), Ames, IA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
CMMI-1454668; AC02-07CH11358; AR0000131; AC02-06CH11357
OSTI ID:
1577117
Report Number(s):
IS-J-10073; IS-J-10102
Journal Information:
Science, Vol. 366, Issue 6469; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 156 works
Citation information provided by
Web of Science

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