Questions tagged [material-science]
The study of how the properties of matter arise from its structure at all scales and of how processing can be used to modify those properties (often in pursuit of a specific application).
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Amount of extension of the metal rods in the same system
If we heated two identical metal rod both vertically and horizontally, we would observe that it expands. However, if the rod is placed vertically, gravity will indeed play a role. The expansion of the ...
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Generating high symmetry unit cell from lower symmetry primitive cell
I'm trying to create a workflow where one step of the process is taking in a primitive cell of a crystal structure and produce a cell that has the highest possible symmetry (conventinal cell) ...
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Stoner-Wohlfarth hysteresis at 0 magnetic field
There is something that is confusing me about the Stoner-Wohlfarth model. Looking at the wiki page, one sees this picture for the hysteresis loop:
The angles denoted are the angles between the field ...
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At which distance a 2D material like graphene is safe from charging impurity of a $\rm SiO_2$ substrate?
$\rm SiO_2$ substrate is widely used for the research of 2D materials but charging impurity of amorphous $\rm SiO_2$ degrades their performance, e.g. reduces the conductivity of graphene.
Inserting ...
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Carbon Nanotube Modeling
In various references, we see the construction of unit cells of carbon nanotubes from chiral and translational vectors.
The chiral vector is given as:
$$\vec C_h = n\vec a_1 + m\vec a_2$$
While the ...
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How do pencil erasers erase on a fundamental level?
One could say we're taking advantage of friction, but I want to dig deeper down to atomic level: what's the process or chain that happens when one erases?
Edit: subatomic -> atomic
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Why does a mixture of bulk $\rm Hg$ + $\rm Cd$ +$\rm Te$ melt at a much lower melting point than any of its constituents?
In a real life setup, a mixture of $\rm Hg$, $\rm Cd$, and $\rm Te$ melts at approximately 330 degrees Celsius. The element with the lowest melting point is Te which melts at 449.5 degrees Celsius. ...
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Magnetic hysteresis curve does not form a closed loop?
Sometimes the hysteresis curves for magnetic materials that I see in articles have this noticeable discontinuity at the saturation points, the curve doesn't exactly close into a loop.
For the example ...
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What is the resistance of this structure? [closed]
A device is made of a material with resistivity ρ and has a structure as shown in the below picture. What is the resistance of this structure?
In my opinion, it is equal to a single block of material ...
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What do we call a material property that has non-equal values when evaluated in opposite directions?
What do we call a material property that has non-equal values when evaluated in opposite directions?
That is, if the material property $k_{ij}$ has a value of $X$ along the direction defined by the ...
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Resource Recommendations for Rigorous Analyses of Impact Mechanics and Terminal Ballistics
I'm an engineer with close relations in body-armor-wearing occupations and am interested in better understanding the extent to which the physical separation of hard body armor plates from the surface ...
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Can infrared light pass through solid materials
I have an IR sensor at about few tens of mm (millimeter) from a heating source (incandescent bulb or heating element). The phototransistor in my sensor is lead lined but I guess it is sensitive to a ...
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“Emergent magnetic monopole” discovered (5th December 2023)
Looks like a few days ago (5th December 2023) a research team discovered “emergent magnetic charge” in antiferromagnetic materials, and the result was published on Nature Materials.
The finding was ...
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Anomaly in Photoelectric effect
Good day.
While doing a physics experiment for a university assignment, I was tasked with measuring the maximum wavelength at which a potassium cathode shined by a monochromatic light emits electrons.
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Do there exist materials whose Opacity varies with temperature?
Do there exist materials whose Opacity varies with temperature?
E.g a Material that becomes more Opaque as it gets hotter?
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