Colossal grain growth yields single-crystal metal foils by contact-free annealing

Single-crystal metals have distinctive properties owing to the absence of grain boundaries and strong anisotropy. Commercial single-crystal metals are usually synthesized by bulk crystal growth or by deposition of thin films onto substrates, and they are expensive and small. We prepared extremely la...

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Published inScience (American Association for the Advancement of Science) Vol. 362; no. 6418; pp. 1021 - 1025
Main Authors Jin, Sunghwan, Huang, Ming, Kwon, Youngwoo, Zhang, Leining, Li, Bao-Wen, Oh, Sangjun, Dong, Jichen, Luo, Da, Biswal, Mandakini, Cunning, Benjamin V, Bakharev, Pavel V, Moon, Inyong, Yoo, Won Jong, Camacho-Mojica, Dulce C, Kim, Yong-Jin, Lee, Sun Hwa, Wang, Bin, Seong, Won Kyung, Saxena, Manav, Ding, Feng, Shin, Hyung-Joon, Ruoff, Rodney S
Format Journal Article
LanguageEnglish
Published United States The American Association for the Advancement of Science 30.11.2018
Subjects
Anisotropy
Annealing
Cold rolling
Contact stresses
Crop yield
Crystal growth
Crystal lattices
Crystal structure
Crystals
Energy conservation
Grain boundaries
Grain growth
Graphene
Metal foils
Metals
Polycrystals
Single crystals
Substrates
Surface energy
Surface properties
Thin films
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Summary:Single-crystal metals have distinctive properties owing to the absence of grain boundaries and strong anisotropy. Commercial single-crystal metals are usually synthesized by bulk crystal growth or by deposition of thin films onto substrates, and they are expensive and small. We prepared extremely large single-crystal metal foils by "contact-free annealing" from commercial polycrystalline foils. The colossal grain growth (up to 32 square centimeters) is achieved by minimizing contact stresses, resulting in a preferred in-plane and out-of-plane crystal orientation, and is driven by surface energy minimization during the rotation of the crystal lattice followed by "consumption" of neighboring grains. Industrial-scale production of single-crystal metal foils is possible as a result of this discovery.
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content type line 23
ISSN:0036-8075
1095-9203
DOI:10.1126/science.aao3373