Calculate the unit cell composition of the two iron-containing platinum-based alloy catalyst as given in Figure 3.

Q: Electronic semi conductor In a direct band gap semiconductor quantum well of 10 nm thickness…

A: In the direct bandgap semiconductor for the transition of an electron from the first excited state…

Q: (d) Describe three of the functions of the matrix in fibrereinforced composites.  (e) With the aid…

A: d) The functions of the matrix in fibre reinforced composites are,

Q: (a) Mark the sites in the unit cell. b (b) List the Miller indices of all the octahedral…

A: In case of FCC, there are 4 atoms. Therefore, there are 4 octahedral voids.

Q: Composite materials must contain more dispersed material and less matrix material.

A: Composite material must contain more dispersed material compare to matrix material.

Q: Outside the unit cell, sketch the atomic configuration for the (111) plane for FCC aluminum. Clearly…

A: Interpretation: To draw the (111) plane for FCC aluminum on the given coordinate system. We have to…

Q: Silicon (Si) is an intrinsic semiconductor with a band gap of ~1.1 eV. Increasing temperature has…

A: For any semiconductor, the electrical conductivity can be expressed as In this case, the following…

Q: 4. Carbon activated by steam generally has a fine pore structure, ideal for adsorbing both liquid…

A:

Q: a)What are the methods of synthesizing the carbon nanotube in solid phase and gas phase, please…

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Q: A non-pure semiconductor has a gap of energy equal to 1ev. The density of the holes for it is equal…

A: The materials with conductivity values lies between conductors and insulators are called…

Q: Project 8: Determine the Miller indices for the direction and planes shown in the following unit…

A:

Q: Compute the packing efficiency of the unit cell with the cross-sectional view as shown.

A: Packing fraction is 78.5%

Q: What evidence supports the notion that buckyballs are actualmolecules and not extended materials?(a)…

A: Buckyball is also known as C60. It is an allotrope of the carbon and called as Buckminster…

Q: Using the virtual crystal approximation, up to what Al composition does the alloy AlxGa1-xAs…

A:

Q: What type of annealing process is used to refine and improve the grain structure of ferrous alloys?…

A: Explantion :- The process in which heat treatment process that changes the physical and chemical…

Q: the donor ConCentration Concentration is the acceptor the resulting Semiconductor would be the…

A: Calculate the donor and acceptor concentrations in the semiconductor.  The concentration of the…

Q: describe the important features of the microstructure for low carbon steel, medium carbon steel…

A: We need to discuss about different types of iron and steel.

Q: show that the atomic packing factor for BCC is 0.68 and for HCP is 0.74.

A: The explanation is given below-

Q: 10. Which of the following is known as indirect band gap semiconductors? Germanium Nickel Platinum

A:

Q: a- Determine the Structure Factor of FCC lattice for all even or all odd Miller indices? b- and what…

A:

Q: Based on its phase diagram, explain the formation of cored structure during the solidification of…

A: A diagram that is used to show the equilibrium conditions between the thermodynamically-distinct…

Q: 1. Derive the coordination number and atomic packing factor of BCC. 2. Compute the density of lead…

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Q: Why do we prefer to coat metals with ceramics? What kind of additional property would a ceramic…

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Q: of the following questions A. What is the lack in using composite materials in automotive? B. What…

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Q: Estimate the number of atoms that would have to be removed from a silicon substrate to produce a…

A: Mass per unit volume is known as density of the substance.

Q: Identify the type(s) of bonding that would be expected for each of the following materials: (i)…

A: Attractive force that holds the constituent particles together is called a bond. There are different…

Q: (a) The BCC iron has a density of 7882 kg/m³ and the lattice parameter of 0.287 nm when hydrogen…

A:

Q: The following is a backscattered electron image of a sample of nickel alloy particles that were…

A: SEM is scanning electron microscopy. It is an analytical technique which involves scanning of a…

Q: Construct a band diagram for Aluminum. Please give an explanation.

A: In 1927, Walter Heitler and Fritz London discovered bands. Bands are very closely spaced orbitals…

Q: Calculate the density of a cemented carbide, or cermet, based on a titanium matrix if the composite…

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Q: b) Diamond is a strong and hard material that does not conduct electricity. Verify this statement.…

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A: Tubes made up of carbon with diameters typically measured in nanometers are known as CNT or carbon…

Q: 3. for an FCC lattice calculate the structure factor Sk.

A:

Q: Spacing between the (200) planes is twice as big as the spacing between the 100 planes in BCC unit…

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Q: Please help me and double and triple check your answers my grade depends on this

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Q: >Provide a general description of how electrometallurgy is used to extract metals from ores.

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Q: Would you prefer to capture Tantalum carbide resistance composite or chemical for beryllium surface…

A: James Webb spacecraft have 3 mirrors.

Q: PART B Q1 (a) Figure 5 shows the type of point defects that may presence in a metal. Compare the…

A: There are 5 types of point defects, named as, 1. Vacancy defect 2. Interstitial impurity 3.…

Q: In the iron-carbon alloy phase diagram as shown in Fig. 1, draw the microstructures with indicating…

A: In the above given phase diagram, gamma is for austenite, alpha is for ferrite, Fe3C is cementite.…

Q: a) For a material having FCC crystal cell structure, write the expressions for Planar atomic density…

A: Planar density is calculated by dividing the number of atoms present in the plane by the area of the…

Q: (b) Shown below are two schematic band diagrams for silicon. Answer the following questions: (i) For…

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Q: Danial is conducting an experiment to evaluate the hardenability of low alloy steel, 4340.

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Q: Calculate the theoretical volume change accompanying a polymorphic transformation in a pure metal…

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Q: Compute the resistivity of aluminum wire 5 mm in diameter and 5 m long. 4 07.6 x 10^-3 O 6.7 x 10^-5…

A: \Given that : Diameter = 5mm = 5×10-3 m Length = 5 m

Q: 9.) Which of the following statements is correct? a) The carrier concentrations increase with…

A: Semiconductors are materials whose electrical property lies between an insulator and a conductor.…

Q: A new strontium iron(III) oxide is calculated to have narrow partially-filled conduction band but is…

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Group 14 Elements

The following elements come under group 14 of the periodic table.