Questions tagged [alloy]
For questions about alloys.
93
questions
1
vote
1
answer
369
views
Comprehensive list of metal alloys along with Moh's hardness scale
Material property lists, such as springermaterials.com, has lists of metal alloys and their properties. Is there a similar website that lists alloys along with their Mohs scale hardness? For ...
- 29
1
vote
1
answer
74
views
How do I separate an Indium-Gallium alloy into Indium and Gallium?
I've recently learned more about Indium and Gallium, and I find them quite interesting, especially how an alloy can be manually made simply by rubbing them together. I'm curious though, is there a ...
- 121
10
votes
3
answers
2k
views
How can steel be so different from iron, even if amount of carbon is small?
Perhaps I am too naive, but I am having a hard time visualizing how even 'high-carbon' iron and steel alloys are maybe, at most, about four percent carbon by mass, which still means only one (smaller) ...
- 1,653
2
votes
0
answers
32
views
Can an alloy catalyst change during a reaction?
I am studying the reaction pathway of oxygen evolution reaction (OER) on a PtNi alloy catalyst using density functional theory (DFT). What I found is that, for different intermediates, the most stable ...
- 121
0
votes
1
answer
107
views
What can happen to overheated aluminum cookware?
I accidentally overheated an aluminum espresso maker, to around 250-300° C in my estimation, but it might be even higher - I didn't measure, though. After research, I found that the material used is ...
7
votes
2
answers
923
views
How to separate Cu and Ni from alloy containing different metals such as Al, Cu, Ni, (Zn, Pb, Sn < 5%)?
I have an alloy containing different metals such as Al, Cu, Ni, (Zn, Pb, Sn, Ag, Si in small amount < 5%). How can I separate Cu and Ni from this alloy?
I tried to dissolve alloy in sulfuric acid, ...
- 89
0
votes
1
answer
120
views
How to dissolve brass surrounded by aluminium?
I have a broken off brass needle stuck in a caste aluminum hole. (It’s the pilot mixture jet on a carburetor).
I was wondering if there was a chemical that would dissolve the brass while not reacting ...
- 9
1
vote
1
answer
124
views
What is the alloying composition of the Zinc-Platinum System?
My research team and I are working on a bimetallic alloy consisting of Zinc and Platinum. We have looked for papers regarding the composition of Zinc-Platinum alloy. But there aren't many papers out ...
5
votes
1
answer
235
views
Boiling sodium hydroxide in stainless steel cup: Solution turning to a blue color
I boiled highly concentrated sodium hydroxide in a stainless steel cup. This created a blackish layer on the bottom of the cup and turned the colour of the sodium hydroxide solution to blueish.
Am I ...
- 53
2
votes
1
answer
190
views
Thermal properties of 301 stainless steel
So I know that 301 stainless steel was chosen for the SpaceX Starship rocket as it can handle high temperature differences.
What about this alloy makes the steel harden when it gets colder?
- 151
3
votes
1
answer
46
views
Performing XPS on Pt–Ru/C nanoparticles
From what I understand, to get clear peaks, $\ce{Pt}$ is analyzed at $\ce{Pt}$ 4f; and $\ce{Ru}$ at $\ce{Pt}$ 3d.
However, if i'm not mistaken, charge correction is needed.
But $\ce{Ru}$ 3d(280/284 eV)...
1
vote
1
answer
51
views
Properties of inconel [closed]
I am doing a project on the physics of the spaceX raptor engine. I believe it is made out of a certain type of inconel alloy. I want to understand why this alloy has the properties that it does, but I ...
- 25
1
vote
1
answer
34
views
Amalgamation involving an alloy [closed]
Just curious, would mercury form an amalgam with gold that is already part of an alloy, i.e a gold platinum alloy?
- 23
6
votes
1
answer
265
views
Origin of the 15% difference limit between solute and solvent atom radii in the Hume-Rothery rules
According to the Hume-Rothery rules for the substitutional solid solutions the atomic sizes of the the solute and solvent must not differ by more than 15%.
Why should it be so?
- 77
0
votes
1
answer
1k
views
What is this white layer on brass?
I have an object made of what I assume to be brass, i.e. an alloy of copper and zinc.
The curved parts have both a black layer and a white layer (also note the verdigris (I guess) on the left top, but ...
0
votes
0
answers
359
views
Are Alloy Compositions Given in Weight Percent or Atom Percent
Often times I see alloys described like this,
Lockalloy is an alloy that consists of 62% beryllium and 38% aluminum
Are the precentages mentioned here in weight percent or atom percent? Is there a ...
- 131
1
vote
2
answers
51
views
Thermal properties of aluminium alloy 6063 [closed]
I am looking for the operating temperature range both in a cold and hot environments (minimum and maximum operating temperatures) for aluminium alloy 6063.
I'm new to finding this kind of information ...
- 21
0
votes
1
answer
91
views
Should equiatomic iron–cobalt alloy be written as FeCo or CoFe?
I have an alloy made of 50% iron and 50% cobalt. I see occasionally in the literature this is written as FeCo alloy.
But shouldn't it be CoFe alloy since the chemical symbols are supposed to be ...
- 131
7
votes
1
answer
381
views
Do we have some "rule of thumb" to estimate the miscibility of metals?
For example, for ordinary fluids, we have polar and apolar ones. The "rule of thumb" is that polar fluids mix with each other, and also apolar fluids mix with each other, but polar fluids ...
- 866
0
votes
0
answers
28
views
Can metal matrix composites be alloyed after their creation?
I've done a little research on metal matrix composites (MMCs), purely for fun and out of interest. Different types of metal powders are combined with reinforcement materials, to produce a reinforced ...
- 145
-1
votes
5
answers
152
views
What are practical examples of simultaneous measuring of quantities?
I am a maths teacher and I'm looking for practical examples of measuring quantities simultaneously, so that mathematically one needs to construct and solve a system of equations. I thought that in the ...
- 109
0
votes
0
answers
132
views
Difference between calcination, roasting and pyrolysis
Hie everyone. I have been going through pyrometallurgical processes for recycling lithium-ion batteries and l have been coming across these terms; calcination, pyrolysis and roasting which l need ...
28
votes
3
answers
13k
views
Why isn't the American nickel magnetic?
I never thought that modern American nickels actually contained nickel anymore. However, according to this wiki article, the coins actually do contain 25% nickel, the rest being copper. And yet, no US ...
- 1,268
0
votes
1
answer
489
views
Electrical and Thermal conductivity of electrum alloys
I have tried to search for this to little effect - I am trying to find electrical and thermal conductivity values for Electrum (a gold and silver alloy). Most sites mention the values depend on the ...
- 113
1
vote
0
answers
48
views
Tungsten-Rhenium alloy connections to Copper. Methods?
I want to use some fine WRe wire (50 micron diameter, 80/20) in a particular environment where it has to conduct a few millamps of current while supporting 100g of mass. The problem being the contact ...
- 1,370
0
votes
0
answers
26
views
Separation of Al-Si alloys without electrolysis
Can pure (or roughly pure) $\ce{Al}$ be somehow thermally, chemically, or physically separated from the $\ce{Si}$ contained in an $\ce{Al-Si}$ alloy? How? Approximately what purity of Aluminum can be ...
- 303
1
vote
1
answer
137
views
What materials are resistant to hot chlorine?
I'm looking to do an experiment involving hot chlorine gas (900 Celsius), however at the moment the only material I'm aware of that could cope with this is Hastelloy's C-22 alloy. What other ...
- 167
0
votes
0
answers
45
views
Phase Diagram-Fe-C, and TTT: Hardness Scale
So far I know that the Hardess scale of these materials is this:
Martensite> Bainite> Perlite > Cementite> Ferrite
Where is Austenite along this scale? I know that Cementite is harder than Austenite....
10
votes
0
answers
677
views
Why doesn't tantalum and tungsten form amalgam?
User @Poutnik has recently answered a question in which he quoted this statement from Wikipedia:
Almost all metals can form amalgams with mercury, the notable
exceptions being iron, platinum, ...
- 22.2k
3
votes
1
answer
323
views
What would happen if I combined this polymer and this metal (assuming I can) [closed]
So let me explain, I recently found out about a material called sorbothane (which is a polymer). Now, sorbothane is special because not only does it highly efficiently absorb shock, but also highly ...
- 39
0
votes
0
answers
2k
views
Eutectic Phase Diagram of Al-Si Analysis
Hello,
How can I know from this phase diagram:
1. The composition of the alloy Al-Si that allows precipitation to occure?
2. The range of temperatures where the Al-Si is soluble?
3. The range of ...
4
votes
0
answers
41
views
Nanoparticle Alloys (Gold-Silver) not forming
I have synthesised what I thought were gold-silver alloys at various different compositions.
The UV/vis data showed that nanoparticles alloys with a majority of the composition made from gold had one ...
1
vote
1
answer
111
views
Substitute molten salt bath with temperature range from 400–500 °C
I'm looking for a suitable substitute for a $\ce{NaNO2/KNO3}$ salt bath (for quite obvious reasons due to the other applications of the latter chemical). The salt mixture needs to have around 400 to ...
- 131
4
votes
1
answer
3k
views
Is the flint used in disposable lighters toxic?
Especially the sparks that result when using them. I heard this from a friend and can't seem to find an answer on Google.
- 41
1
vote
2
answers
390
views
How is it that earth's inner core is still solid?
Earth's inner core is made up of an alloy of Iron and Nickel.
The important note here is that it is solid.
The temperature at the inner core is about $5,763K = 5,490\text{ degrees C}$.
Now the ...
- 141
1
vote
0
answers
880
views
Find alloy composition by density
I have a square piece of metal from a processor heat sink that looks a lot like copper. I'm trying to find the alloy composition but I'm not sure how.
I happen to have both a digital caliper and a ...
- 141
6
votes
0
answers
274
views
What are metal zip tags and belt buckles made of?
Metal zipper tags and belt buckles melt very easily and can be melted by heating it in the stove for 5 minutes. But other metals like aluminium refuse to melt even after hours.
If you leave it ...
- 383
2
votes
2
answers
605
views
Boric Acid and Brass Alloy
Can someone explain why boric acid prevents zinc from vapourizing out of the brass alloy when it is being melted? What is the actual chemistry occurring and why?
Thanks
- 127
2
votes
1
answer
273
views
How does bismuth's lone pair affect its properties as a metal and alloy?
Bismuth is really the only metal to exhibit a lone pair in its outermost shell, this means that it and its salts should be a Lewis base. As bismuth can act as a Lewis base, how does this affect its ...
- 900
-1
votes
1
answer
83
views
How would ceramic coating inside the reactor affect heat transfer? [closed]
With the ceramic coating, would I be able to get its internal temperature raise upto 520.
I would like to get a reactor fabricated for plastic pyrolysis. The temperature would maintained around 520C. ...
- 79
1
vote
1
answer
56
views
What is the reason behind the 2% increase in silver metal composition just after melting the raw silver alloy (55% silver)? [closed]
I determined the silver composition from an alloy obtained from a jeweler to be 55% and wanted to extract silver out of it. However, upon melting around 5 kgs of alloy, the silver composition went up ...
- 27
10
votes
2
answers
2k
views
Brass Instrument: Dezincification or just scrubbed off?
I do own a brass instrument (a trombone). The lacquer is damaged.
I asked how to deal with it here.
Now I learned that the brass contains zinc, and there is a corrosion process called "...
- 209
3
votes
1
answer
52
views
Which is the suitable process for ball milling?
Why do we mainly choose the wet ball milling process in spite of dry ball milling process? Both processes are used to make a homogeneous mixture of different compounds.
- 31
2
votes
0
answers
53
views
Structural entity for the tattoo resembling spine surgery involving 6AL-4V ELI alloy
I have very little background in chemistry, so forgive me if I sound ridiculous and uneducated.
I want to have a tattoo designed in honor if my spine surgery that I had. I think that molecular ...
- 29
4
votes
1
answer
84
views
Why did my milled powders catch fire?
I milled a small amount of the sample ($75\%$ Al, $15\%$ Cu, $10\%$ Ni) mixed with toluene for 5 hours after which I set it on butter paper to dry. Then after 13 minutes I switched on the fan in the ...
- 51
1
vote
1
answer
70
views
Iron-platinum refining
If I have an iron-platinum alloy, can I put this into a solution of $\ce{HCl}$ to dissolve the iron, leaving a $\ce{Pt}$ precipitate?
I know that Fe dissolves in $\ce{HCl}$ to form $\ce{FeCl2}$ and $\...
- 328
5
votes
2
answers
12k
views
Does cold bluing steel prevent rust?
I've recently purchased a Damascus knife and am patiently awaiting it's arrival in the mail. I have been researching the potential care and maintenance habits for this craftsman blade, hoping to keep ...
- 53
16
votes
2
answers
3k
views
What does "René" mean in René alloys?
René alloys are nickel-based super alloys (René 41, René 88, René N5 etc. etc.). But how did it get the name René? Is it an acronym or contraction of other terms? It was created by Earl Ross and the ...
- 163
0
votes
2
answers
4k
views
How do foundries prevent zinc from boiling away when alloyed with Aluminum?
How do foundries prevent lower boiling point metals such as zinc from boiling away when alloyed in a furnace with higher boiling point metals such as aluminum?
- 593
5
votes
1
answer
136
views
Why don't alloys self-galvanically corrode?
Total chemistry newbie here (so this may be a fairly obvious question). With that said, I've had a niggling question that I can't quite resolve myself;
Given that galvanic corrosion is driven by the ...
- 53
Hot Network Questions
- Feature without geometry in Geopackage layer
- JPL Horizons - "highly accurate measurements of planetary positions" - how do they do it?
- Check stock status at a retailer
- Protecting Smoke Alarm Relay from Large (6.5 amp @ 120V) Inductive Load
- If some sentence has truth, could it be called sarcasm
- Why does the government not introduce an amendment to the constitution to allow abortion?
- Flood fill by distance
- Does my cat hate me now
- The best way to prepare the undergraduate student before entering the scientific research
- What is the name of this creature?
- How do I make a program quit with "q" and restore the console like "man" does?
- What are some ways to ensure that a cryptography library is reliable in an ecosystem that is new to me?
- What is the point of term life insurance?
- Iterative Smallest Complement
- Separation of the Church and State in Hinduism
- Friend looking to return to study without transferring any credits
- How would you standardize on-call expectations across software teams when they've diverged at the same salary level?
- How to bend a straight strip into a complete circle?
- Enumerate specific equations with Roman numerals with stars
- Why do I get accosted for taking photos of a war memorial?
- Array access is O(1) implies a fixed index size, which implies O(1) array traversal?
- The Unaverageables
- Change interface depending on if statement
- Unusual for show to be on both HBO and CNN; and what exactly does "linear CNN" even mean?