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Ultimate tensile strength
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Ultimate tensile strength is the maximum stress that a material can withstand while being stretched or pulled before breaking. In brittle materials, the ultimate tensile strength is close to the yield
Two vises apply tension to a specimen by pulling at it, stretching the specimen until it fractures. The maximum stress it withstands before fracturing is its ultimate tensile strength.
Two vises apply tension to a specimen by pulling at it, stretching the specimen until it fractures. The maximum stress it withstands before fracturing
Round bar specimen after tensile stress testing
Round bar specimen after tensile stress testing
The "cup" side of the "cup–cone" characteristic failure pattern
The "cup" side of the "cup–cone" characteristic failure pattern
Some parts showing the "cup" shape and some showing the "cone" shape
Some parts showing the "cup" shape and some showing the "cone" shape
Graphene
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Graphene is a variety of the element carbon which occurs naturally in small amounts. In graphene, the carbon forms a sheet of interlocked atoms as hexagons one carbon atom thick. The result resembles
Ultimate tensile strength
…400 at 25 °C, 275 at 500 °C, 345 at 1,000 °C 1,900 3.9–4.1 Boron nitride nanotube —N/a 33,000 2.62 Diamond 1,600 2,800 ~80,000–90,000 at microscale 3.5 Graphene —N/a intrinsic 130,000; engineering 50,000–60,000 1.0 First carbon nanotube ropes ? 3,600 1.3 Carbon nanotube (see note below) —N/a 11,000–63,000…
Graphene is an atomic-scale honeycomb structure made of carbon atoms
Graphene is an atomic-scale honeycomb structure made of carbon atoms
Andre Geim and Konstantin Novoselov at the Nobel Laureate press conference, Royal Swedish Academy of Sciences, 2010.
Andre Geim and Konstantin Novoselov at the Nobel Laureate press conference, Royal Swedish Academy of Sciences, 2010.
Scanning probe microscopy image of graphene
Scanning probe microscopy image of graphene
Photograph of single-layer graphene oxide undergoing high temperature chemical treatment, resulting in sheet folding and loss of carboxylic functional
Photograph of single-layer graphene oxide undergoing high temperature chemical treatment, resulting in sheet folding and loss of carboxylic functionality, or through room temperature carbodiimide treatment, collapsing into star-like clusters.