Will ferromagnetic dust retain magnetism in molten aluminum?

AI Thread Summary
The discussion centers on whether ferromagnetic dust can retain magnetism when molten aluminum is poured over it in a silicone mold. The Curie temperatures for magnetite and iron are noted, with magnetite at 858 °C and iron at 1043 °C, while aluminum melts at approximately 660 °C. Concerns are raised about the potential burning of aluminum in magnetite and the behavior of ferromagnetic powder in liquid metal. Participants also express curiosity about the feasibility of using homemade magnetite powder versus industrial steel powder for this process. The overall inquiry revolves around creating aluminum details that retain a permanent magnetic field.
Nick23
Messages
6
Reaction score
0
Curie temperature for magnetite is 858 C, for iron 1043 C. Duralumin melting point is about 630 C. Does this mean that if I take a small silicone mold, place a magnet underneath it, add ferromagnetic powder to the mold and then pour molten aluminum in, I will get the aluminum detail with permanent magnetic field ?

P.S. Aluminum will probably burn in magnetite, but what about pure iron ?
 
Last edited:
Engineering news on Phys.org
Silicone?

The powder could stick to the ground.
Where do you get magnetized iron powder from?
 
  • Like
Likes Nick23
Silicone? The powder could stick to the ground. Where do you get magnetized iron powder from?

They use silicone molds for metal casting, some of the powder might stick, but I'm curios if it will spread over liquid metal as it does in ferromagnetic fluids. I only had home-made magnetite powder so far, made with file, hammer and a DIY ball-mill. I was thinking that industrial waste steel powder will do the trick if placed next to a magnet in the glass container.
 
Nick23 said:
Curie temperature for magnetite is 858 C, for iron 1043 C. Duralumin melting point is about 630 C. Does this mean that if I take a small silicone mold, place a magnet underneath it, add ferromagnetic powder to the mold and then pour molten aluminum in, I will get the aluminum detail with permanent magnetic field ?

P.S. Aluminum will probably burn in magnetite, but what about pure iron ?
The Curie temp for iron is 1043 °K, or about 770 °C; for magnetite it's 858 °K (585 °C)

https://en.wikipedia.org/wiki/Curie_temperature

The M.P. for aluminum is 660 °C. You've got to pay attention to the correct temperature scale here.
 
Are you trying to create an aluminum sculpture of a magnetic field?
 

Thread 'How could I make it so ferrofluid drops do not coalesce?'

Hello! I've been brainstorming on how to prevent a lot of ferrofluid droplets that are in the same container. This is for an art idea that I have (I absolutely love it when science and art come together) where I want it to look like a murmuration of starlings. Here's a link of what they look like: How could I make this happen? The only way I can think of to achieve the desired effect is to have varying droplet sizes of ferrofluid suspended in a clear viscous liquid. Im hoping for the...
View full post »

Thread 'How do you fabricate microfluidic chips in your lab?'

Hello everyone! I am curious to learn how laboratories handle in-house chip manufacturing using soft lithography for microfluidics research. In the lab where I worked, only the mask for lithography was made by an external company, whereas the mold and chip fabrication were carried out by us. The process of making PDMS chips required around 30 min–1 h of manual work between prepolymer casting, punching/cutting, and plasma bonding. However, the total time required to make them was around 4...
View full post »

Similar threads

Research question about burning metals and their flashes and colors
Replies
12
Views
5K
Searching for best ferromagetic cathode for aluminum anode battery
Replies
1
Views
2K
Ball Lightning Debunk, New Proposal
Replies
1
Views
4K
Chemically regenerating my auto's catalytic converter?
Replies
19
Views
7K

Hot Threads

Recent Insights

Back
Top