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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Determining the material properties for alloys
I have the individual material speed of sound and Hugoniot s-parameters for different metals, and I wish to determine the same for an alloy with a specific ratio of each metal in it. Does taking the ...
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Which better conducts vibration: wood or metal?
For some reason I can't get a definitive answer on this. My bedroom is on top of a garage, and every time the garage door opens/closes, the old garage opener that's positioned on the ceiling vibrates ...
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How does one use empirical pseudopotentials to model disordered random alloys?
How does one use empirical pseudopotentials to model disordered random alloys?
I am working on modeling random alloys and came across the following paper: https://link.aps.org/pdf/10.1103/PhysRevB.85....
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Would the angle of diffraction past a slit be different for water versus a different liquid compound?
Looking at depictions of waves passing through a slit, I was wondering about the angle of diffraction, for example, for my eyes, the angle created by the line of dark-blue tips below:
I know I may ...
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Is expansion necessary for negative heat capacity?
Gravitationally bound gas has negative heat capacity. It expands and its temperature decreases as heat is added.
What about electromagnetically bound systems such as solid materials? Is it possible to ...
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How do semiconductor interactions affect material strength?
In different fields, for example semiconductor physics, you assume a rigid lattice of atoms exists (at least in my books) and this structure basically sets the framework for different interactions (ex ...
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In terms of Material Science, why do household garbage bag seal water and air, but allow odor to pass through?
In a household garbage bag (the common 13 gallon or 33 gallon ones in the US), some baby diapers were inside. I already twirled the bag opening like 5, 6 times, and then use an extremely tight knot ...
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How much pressure would it take to compress an object to electron degenerate matter?
If somebody with telekinetic powers were to crush an object until it was electron degenerate matter how much pressure would need to be applied? I know the answer will almost certainly vary depending ...
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Why defects don't have an effective charge in metals?
In semiconductors and insulators, crystal defects, e.g., vacancies and interstitials, are treated as having an effective charge. In metals, however, defects are treated as neutral. I can expect that ...
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Is X-Ray-Emission-Containing Phosphorescence possible or is it limited to Immediate-Emission XRF?
This was a random thought that I wanted to follow up on. I know some materials can take in and kick out X-Rays in XRF (Though most x-ray scintillators tend to emit mostly visible light, not x-rays). ...
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Potential of Monolayer Graphene as a High-Precision Cutting Material
"I am exploring the use of monolayer graphene as a cutting material for high-precision applications. We know that graphene has exceptional mechanical properties, such as high strength and ...
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What is the material with the highest mass enhancement factor?
The electron phonon coupling mass enhancement factor $\lambda$ is a measure of the strength of this coupling. This quantity can be measured experimentally. For instance, Pb has a factor of 1.55 ...
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How can we calculate entropy produced by plastic deformation in this example?
Suppose we have a massless spring of spring constant $k$ attached to a mass $m$ at equilibrium position $x_{0}$ at temperature $T$. The mass may oscillate in one dimension only for simplicity. We ...
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Electron microscopy and Interatomic distances of miller planes [duplicate]
I am studying Transmission Electron Microscopy (TEM), and have been seeing in articles TEM images of different materials typically come accompanied by these diffraction patterns, caused by the ...
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Could a transparent frequency-altering material be possible?
I would imagine a material that is transparent but a electromagnetic wave going out will have a lower frequency than when going in (and maintaining it's direction). You could build glasses to see UV-...
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The absorption of infrared light for regular materials, like fabric wallets backpacks and clothes
I work as a brand partner for a company that produces a patch which strengthens the production of stemcells in the body.
The patches are activated with the help of the bodys own infrared radiation.
I ...
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What step is missing from this transformation of the Clausius-Mossotti relation into the Garnett-Maxwell equation?
When deriving the Maxwell-Garnett equation for composite systems (host material with dielectric particles disposed in it), the steps generally taken are
Step 1) Equate the Clausius-Mossotti equation ...
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Light acceleration method using inhomogeneous material mediia
Some time ago I posted this question but I reckon it was too vague. Nontheless, I've been working on it and I've come up with some interesting conclusions. My question is: can light be subject to an ...
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How does it work with permeability?
I have a question regarding the permeability for a material, if I have an electromagnet of two different materials. So also two different values for permeability, does the lowest value for ...
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Structure factor correct calculation
I have a set of 2D points and wish to test it for hyperuniformity.
As I've learned from papers, the good idea is to calculate structure factor $S(\mathbf {q})$ and test it for
$$\lim _{\mathbf {q} \to ...
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Flatband with our Moire Physics
Is there any material Class available where the lattice vectors are in the order of several nm instead of Angstrom? I am looking for some exotic not well studies lattice class which can be ...
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Does a rubber mat reduce the impact to the floor below?
My lack of physics knowledge is preventing me from solving an everyday life problem. Please bear with me!
Say I have a second-floor apartment and I want to do deadlifts. I am afraid of the floor ...
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Reason for stress and strain
Do you think that the stress is due to strain or vice versa?
I have this doubt because of two of the following scenarios:
Consider the case of the rigidly fixed bar. It is now heated (say be some ...
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Bulk modulus of metals at room temperature
Imagine a sample of solid metal at room temperature. It exhibits resistance to compression which is expressed as its bulk modulus. Part of this resistance originates from a treatment of the ...
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What is the maximum load in the puncture resistance formula?
I've been trying to research how fencing jackets work and I've learned about puncture resistance but I was trying to find the formula for how it was calculated and I found this website that gives me ...
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Limit of proportionality for compression of materials
Similar to how there is a limit of proportionality for the extension of materials, is there a limit of proportionality for the compression of materials. If there is, then what sort of structural ...
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What is the unit cell and the bravais lattice of a perovskite?
First year PhD. student here. I keep trying to wrap my head around what kind of bravais lattice and how does the unit cell of a perovskite look? I am specifically interested in bismuth ferrite (BiFeO3)...
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Predicting electrical mean free path in nanostructures?
How does one roughly predict the
mean free path for
electrical conduction
in a nanostructure at different temperatures and under different electrical conditions such as different voltages and ...
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Can doping significantly decrease a monolayer semiconductor's band gap to almost metallic levels?
I am currently an undergraduate student tackling DFT calculations on my 3x3 CsGeBr3 perovskite monolayer with Fe-doping and Biaxial Straining using Quantum Espresso thru BURAI. I have found out that ...
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Identifying symmetries of rank 2 tensors
Let's say I have a material with permittivity tensor: $$ \epsilon_1 = \begin{pmatrix} \epsilon_{xx} & \epsilon_{xy} & 0 \\
\epsilon_{xy} & \epsilon_{yy} & 0 \\
0 & 0 & \...
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