Aluminium Definition and 156 Threads

Hello, Does anybody know whether the alloy elements (Cr, Mg, Mn, Fe) in the aluminium alloy Al - 5083 are mainly interstitial or substitutional. The reason I want to know this is that this has an effect on the thermal neutron diffraction of this material... thanks!

hey guys, just a quick question about the magnetic field lines and aluminium, because aluminium is not magnetic, do magnetic field lines pass through the metal unhindered, or are they distorted? or is thickness become an issue? this is in relation to mounting permenant magnets in an...

Good Day, I have defective Aluminium windings motor. As you know Aluminium is very difficult to winding. So, I want to use Copper wire to re-winding the motor. How can I do that? What size should I use and what will be the number of turns? Someone told me that you can use...

Can anyone help me with this homework question? it was like this: The reaction between the acid and aluminium is slow in the beginning and then gets faster. Give an explanation for this observation. Thanks.

Homework Statement An aluminium sleeve of internal diameter 4.000cm at 10 degrees Celsius is heated and slipped over a steel rod of diameter 4.040cm (at 10 degrees Celsius. When the aluminium sleeve and steel rod return to room temp they are impossible to separate. Assume that the...

Hello, this is my first post, i hope somebody can help me. I have searched for the answer myself all over on the web and here, but I am stuck. Im trying to work out the maximum pressure (psi) that i can get into an aluminium cylinder that's 80mm wide and 250mm tall and 4mm thick ive found...

Homework Statement Question: If the linear expansivity of aluminium is 24 x 10-6 K-1, how much does the aluminium expand during the heating? Homework Equations As far as additional information on the question goes; An aluminium rod is heated from 15 degrees Celsius to 120 degrees Celsius. The...

Could anyone please help me? If I have a piece of aluminium Angle that is 30mm x 30mm by 3mm thick and 1m long, if I were to substitue this with a piece that is the same thickness and length but 60mm x 60mm what increase in strength would I see? If instead of increasing the size what would...

Hi Guys This is my first post. I hope someone can help. I'm building a hovercraft, the fan that lifts the hovercraft is made of pine timber and the blades are carved from the pine. The blades weigh 200grams each and are spinning at 3000rpm. Question, if a blade broke of wilst spinning at...

Discuss in terms of the possible microstructural differences how the proof stress of the aluminium alloy tested in bending could be greater than the proof stress of the alloy tested in the tensile machine. (Be specific to aluminium alloys)

Hallo Is there someone that can explain why Al can be used to form Ohmic contats to both p- and n-type Si? When looking at a Ohmic junction between a metal and a semiconductor, it is formed when the work functions are as follows: \Phi_m>\Phi_p and \Phi_m<\Phi_n. How can Al fulfil both or...

Hi PF, I watched a video on youtube about a physics professor who asked some questions at the end of the video but didn't answer them. One really interested me. If you have a plane aluminum plate with a very little hole say in its center and you heat the whole plate. What happens to the size...

I am made to understand that you are meant to use different etching agents for different aluminum alloys. How does one find which etching agent is the right one for each alloy? Does anyone know what etching agent I can use for Al 3104? Thank you

Hi everyone, Not sure if this should be here or in the chemistry section. It's a question about chemical reactions in aluminium. I work for a construction company and we have a number of aluminium sheets used for cladding and roofing. We've noticed that some of these have a blacking and...

Hi all, I am after some materials based help please. Im trying to re-profile part of an intake runner on an aluminium cylinder head. Wanting longevity, I've opted against the usual route of using epoxy resin to build up a specific area. Basically i would like to try and fill the section (or...

Does anyone know firstly what this type of formula is called: H-H, i know that it describes the bonding but can't remember what it is called :O Secondly, how would i show the bonding in aluminium oxide usingthis type of formula?

How does the induction cooker work?why aluminium pot does not work? Thank you in advance

Hi guys I was looking at a website and the engineer was working with Gallium and Allaminium oxide, and by accident they put water with it and the reaction produced hydrogen. Could anyone expand on this? regards Bioman

Homework Statement A 40mm diameter bar of aluminium is 2.5m long the bar is has its temperature raised from 20°c to 40°c. Determine the increase in length of the bar in mm. Take the Al = 24 × 10-6 °C-1 How much heat has been transferred into the bar if the SCH = 0.9kj/kg °C Homework...

[SOLVED] Aluminium Hydroxide as Amphoteric Substance Homework Statement Aluminium hydroxide is an amphoteric substance. It can act as either a Bronsted-Lowry base or a Lewis acid. Write a reaction showing Al(OH)_{3} acting as a base toward H^{+} and as an acid toward OH^{-}. Homework...

Homework Statement A clear plastic pen of length 14.5 cm is rubbed with wool. The charged plastic pen is held over a small uncharged disk shaped piece of aluminium foil of diameter 0.5cm. How close you must move the pen to the foil in order to pick up the foil? The Attempt at a...

I desperatly need help, i need to know everything there is to know about the recovery of aluminium from bauxite ore, the process, the cost, everything. Please, if you have any knowledge or know of any GOOD webpages, please post them here. thanks:)

Hi guys, Not sure whether this belongs in elec or mats/chem so I thought I'd put it here. Basically I am trying to extract current from a thin aluminium layer. Due to the Al-Oxide layer, simply soldering an external lead isn't working. I'm able to etch away (some?) of the oxide layer...

Not quite sure how to calculate 0.2% proof stress of aluminium. The graph for which I need to read is below.

What is the current carrying capacity of a 1000 sq. mm. 3&1/2 core alluminium cable laid in air [in case of single run, in case of double run...]??

Why do they say that copper wires are more conductor than aluminium wires?

what is the work function for Aluminium Oxide?

Quick question (...and I hope I have this in the right forum) Does anybody know anything about the effects of inhaling dust particles of anodized aluminium? I am especially interested about finding information on any possible negative effects on the respratory and cardiovascular systems...

Hi all, I am currently in the process of writing up my AS coursework investigation of finding the specific heat capacity of Aluminium, and am a bit stuck at explaining some of my results. My results for the SHC of Aluminium are lower than the published values. My value: 700.93 JKgC...

aluminium framework... I am designing an aluminium frame bed. I have desided to use aluminium extrusion either square or rectangular shape to form the main 4 bars at the base supported by 4 legs. I will use panels of plywood at the centre holding the mattress. My question is...suppose the...

In a paragraph in the textbook "When CSIRO scientists were called into investigate, they discovered that the cause was the oxidation of iron pyrites in these area, much of which had been exposed as a result of draining swamps for grazing cattle and the use of floodgates to drain cane fields...

Hi. I am new here! I'm doing a experiment on the absorption of beta radiation of aluminium and I need help! :redface: Does anyone know what the absorption coefficient of aluminium? Or at least where I can find it. Thanks in advance! o:) P.S. Sorry if I've posted in the wrong part of the forum...

1' after a metal rod rubbing with a cloth, is the metal rod remains neutral in charge whereas the cloth will be positive charge? 2' a small pieces of paper and aluminium foil are attracted by charged metal rods when the rods are brought close to them. however, the former stick to the rod...

hi! i am trying to find out information on what happens to 2024 alu when it is heated and then quenched rapidly. i am trying to find information relating to grain boundary segregation as the rate of cooling is changed. does anybody have the knowledge of a good source? thanks guys

Why does copper conduct heat better than aluminium and iron? Could anyone help me answering the question? Thanks.

Is there a way to measure the temperature in an induction oven for melting of aluminium(700 C). The pyrometer I’m using can’t correctly display the temperature when the system is running because it interferes with the induction field. The non-contact IR-camera has been abandoned because of the...

Hi, I have been doing some experimentation with parallel plate capacitors, see https://www.physicsforums.com/showthread.php?t=124150" For one arrangement of aluminium plates (air as the dielectric) I was expecting the measured capacitance to be approx. 7.9pF and what I measured was 65pF...

I've calculates the density of aluminium using the debye theory. I found The atom density n = 2.24E28 m^-3 at 600k (assumed to be the same as at room temperature). Therefore the density is just the molecular mass m (m(grams) = (79amu / Avogadros number), multiplied by the atom density...

Hi. Is there any acid that will cut through Aliuminium (1mm thin).

Hey, I'm doing some coursework on the properties of aluminium and why aluminium is a good material for computer cases. Now, in the coursework I must have a section on some sort of calculation but am clueless as to what calculation I could do (i.e. if you was doing nylon for a fishling line...

Does anybody know any sources from where i can get die cast aluminium tubes? This is in the Uk. Pretty urgent, within a week. Cheers!

hi all, im wondering why it is dangerous to grind a mixture of powdered aluminium with potassium chlorate in a mortar and pestle. any help would be great.

This question comes from my Grade 11 Univ. Physics Teacher. Problem: To as many significant figures as you can justify, determine the thickness of the aluminium foil. 1. Purpose 2. Procedure 3. Calculations (Significant Figures) 4. Conclucion Now I know that the density of...

Hi I want to determine the bending load limit to elastic failure of extruded aluminium square section, 50 mm sq, warious wall thickness, 1, 2, 3, 4, 5 mm I thought I could get a good estimate from the tensile strength. I found a value of 90 Mpa for commercially pure aluminium but doubt...

whenever i use deodorant (any brand of deodorant), i always see similar aluminium compound- i cannot remember the name. is this metal compound dangerous for the skin? :frown: i am not chemist, and i know very little about chemistry.

Hi, If I mix aluminium (tin foil) with hydrochloric acid I get the following reaction: 2Al(s) + 6HCl(aq) -> 2AlCl3(aq) + 3H2(g) So I end up with aluminium chloride disolved in the water. If I boiled the water would I be left with pure aluminium chloride? I'm thinking the water...

I would like to Know which aluminium temper will get the best coating of Ni-Cr, the options I have are: 6063,6061,6082,6005. thanks

Please help. What would the final temperature have been if 156g of aluminium metal at 50c had been added to iced water containing 10g or ice and 90g of water at 0c? delta H for the freezing of water is -6.02kJ/mol. I don't see how delta H becomes incorporated. Do I have to take into...

hi guys if you have an aluminium sphere of volume 0.006 metres cubed, how do you find the gravitational force acting on the sphere, as well as its acceleration (ignoring water resistance) Also, if your given the area and velocity of a fluid at two points of hose, how can you find the...

Hi, I'm trying to write an equation to show what happens when mercury liquid (Hg) is placed on a block of aluminium (Al). But I'm having some problems. Here's my current line of thinking (I haven't yet worked out any subscripts so I will just use the atomic symbols): Al has an aluminium...