Due to the hard carbon nanofibers and abundant welded joints among the nanofibers, the hard carbon aerogels display robust and stable mechanical performances, including super-elasticity, high strength, extremely fast recovery speed (860 mm s-1) and low energy loss coefficient (<0.16). After tested under 50 % strain for 104 cycles, the carbon aerogel shows only 2 % plastic deformation, and retained 93 % original stress.
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2025-08-15 04:23
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The development of twist drills also led to the refinement of drill bit geometry, including the addition of secondary cutting edges and better chip evacuation channels The development of twist drills also led to the refinement of drill bit geometry, including the addition of secondary cutting edges and better chip evacuation channels
The classroom may no longer be our primary source of knowledge, but the world around us becomes an open book, ready to teach us lessons far beyond textbooks The classroom may no longer be our primary source of knowledge, but the world around us becomes an open book, ready to teach us lessons far beyond textbooks