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Engineering Stack Exchange

Questions tagged [ceramics]

18 questions
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Can Rotary Friction Welding be used to join metals and ceramics?

Is Rotary Friction Welding a good method to join cylinders of a metal (such as Ti alloy) and a ceramic (such as SiC). I know that Diffusion bonding can be used in such cases. However, it has its own disadvantages - particularly its time-consuming…
user0
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What material should I use to store molten metal?

I'm performing an experiment based on slag corrosion behavior of the refractory material. I need to store molten metal at $\approx$ 1600-1700 K for that. Specifically, I'm working on slag corrosion and penetration behaviour of refractory…
dilkesh kumar
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What is the highest-temp castable refractory cement available?

I very much ruined 3 $10 diamond hole saws making this ceramic insulator out of a firebrick and Ryobi drill press. Drilling out the large core took 1-2 hours and a lot of arm strength. Therefore, I will turn to custom ceramic shops or my own…
D Left Adjoint to U
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What's the most cost-effective cutter bit material that can be used to machine aluminum oxide?

Al2O3 is a hard, white material used for making firebricks and numerous molded ceramic parts. Say I had a firebrick, took a core out of it using a thick-walled diamond hole saw and a drill press. What lathe insert material would I then use to…
D Left Adjoint to U
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Connect heated copper tube in PVC tube

I have a copper tube that I'm heating (quite a lot) with a torch, I have to connect a PVC pipe in the entrance of the copper and one in the exit (so water can flow through the copper pipe). The only problem is that the copper tube is too hot, so…
Lucas Heise
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Why Green Porcelain was Used for Chalkboards

This site: https://www.businessinsider.com/why-most-blackboards-are-actually-green-and-not-black-2017-11#:~:text=The%20color%20change%20came%20in,likely%20to%20survive%20the%20journey states that chalkboards are often green because manufacturers…
MeltedStatementRecognizing
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why did my ceramic matrix composite turn out brittle as snow?

I have attempted making a ceramic matrix composite (cmc) by wetting glass fiber cloth with waterglass and baking it at 200°C. The resulting material disintegrated on touch. Unwetted fibers did not change their properties after baking. How can this…
Francis L.
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Kiln design, heating element holders

I intend to build a kiln in my free time over the next few months and am trying to avoid my past mistakes (heated too quickly, the kiln started cracking, the kanthal element melted and it was just plain terrible). So I'm thinking of using element…
Semptum Valoris
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Ceramic pressure measurement - piezoelectrical or capacitive?

Context: I'm writing about an old industrial training facility used for a petrochemical process. In this training facility, there is a 3-phase separator. On that separator is a pressure measurement. My teacher, having limited knowledge of the…
A. Kvåle
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Exact definition of ceramics

Exactly what are "ceramics"? I found a lot of similar "definitions" of that term online, e.g. on Wikipedia and here. These (and other) sources essentially state that ceramics are non-metallic, non-organic materials. And they state the most…
Elon Musk
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Is it possible to create a hard slick non-stick non-degradable substance?

I once read on a web page I can no longer find that corundum is a covalent network. I'm guessing that's because despite the fact that the electronegativity difference between aluminum and oxygen is more than 1.7, corundum has exactly 2 valence…
Timothy
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Power from piezo material

Suppose there is a given piezoelectric material and under a given force it produces voltage $V$. If an external electric circuit is attached with load $R$, the current will be $I= V/R$. Also power generated will be $V^2/R$. By choosing $R$ very low,…
bfugvbjimk
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Can I use ceramic fiber blanket inside a microwave?

I want to activate some carbon inside a microwave. Temperatures will reach 900 C, hence ceramic is the best choice. However, it is quite difficult to find air tight ceramic containers. I intend to use a ceramic fiber blanket to seal all the gaps. on…
Amit Agarwal
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Can the fragility of ceramic armor be avoided by creating ceramic material with little to no defects?

Sorry if the question is wrong/confusing but this is because the subject is confusing, especially when you don't have a degree in engineering/materials science. Ceramic armor usually breaks upon impact by a projectile/HEAT charge so my question is,…
bombadil
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Methods for cutting glass

I am trying to find the easiest way to cut a thick glass pattern (glass thickness of 1-3 mm thick) without breaking. I am considering laser cutting but I don't know if I can cut glass of this thickness. Can anyone suggest an easy way to cut curved…
Lydia Ioannides
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