Sintering of ceramics may exhibit the following characteristics: Select one or more: O a. It involves the high-pressure deformation of a pre-existing shape into a new form O b. Pores become larger on average O C. Parts of the material may become amorphous Pores become smaller Od. e. O f. The total surface area (including internal area) decreases The surface energy of the system increases

Sintering of ceramics may exhibit the following characteristics: Select one or more: O a. It involves the high-pressure deformation of a pre-existing shape into a new form O b. Pores become larger on average O C. Parts of the material may become amorphous Pores become smaller Od. e. O f. The total surface area (including internal area) decreases The surface energy of the system increases

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Sintering of ceramics may exhibit the following characteristics: Select one or more: a. It involves the high-pressure deformation of a pre-existing shape into a new form b. The total surface area (including internal area) decreases C. Pores become smaller d. Pores become larger on average Parts of the material may become amorphous Of. The surface energy of the system increases e.
نقطة واحدة The third sequence in the Injection machine of polymers, a shot of melt, which has been brought to the right temperature and viscosity by heating and the mechanical working of the screw, is injected under high pressure into the mold .cavity TO FO * Coppola is used to convert pig iron to gray .cast iron TO F LL
Question 10 A 2m? glass panel needs to be toughened to increase its strength and impact resistance. What processing would you recommend? Describe the suggested process and explain how toughening is achieved.
Which of the following most accurately describes liquid state sintering processes? O a. O b. O C. O d. The transport mechanism is viscous flow and diffusion. The transport mechanism is diffusion. The transport mechanism is evaporation and condensation. The transport mechanism is viscous flow and solution precipitation.
A- What is meant by the term superheat?. B-Write the applications of bioceramics in human body and what is the limitations of using this type of ceramic. C- What is the other compatibility characteristics that may be important in the function of an implant device made of biomaterials. D- What are some of the factors that affect the fluidity of a molten metal during pouring into a mold cavity?
36- At Powder Pressing of ceramic, the function of binder is ….. * a- decreasing of porosities. b- lubrication of particles. 37- Ceramic substrates that are used for integrated circuits and layered capacitors are manufactured by ……. * b- tape casting. a- rolling. 38- Material which has no fixed solidification temperature, is considered as…. * a- crystalline. b- glass. 39- Refractories that are rich in magnesia (MgO) are termed…… * a- Acidic. b- Basic. 40- The function of Feldspar is …… * a- filler. b- flux. c- plastic material.
Metallic glass ？
Impregnation refers to which of the following; O None of the mentioned O Something that should not happen in a factory Filling the pores of the PM part with a molten metal Putting polymers into the pores of a PM part *
a) Explain the functions of a plastic coatings. b) Assume you are a Mechanical engineer working in Al Jazeera Steel Company LLC is situated in Sohar. You are assigned a task to setup the system to coat the surface of the hot component dipped in oil. For example the dark blue colour steel gun is shown below. Based on the above scenario, answer the following questions. i) Suggest the suitable surface coating process. ii) Explain the above surface coating process in detail.
لانقطة واحدة of Warm working The advantages over cold working are: 1) forces and power are higher,2) more intricate work geometries possible, and 3) need for annealing may be reduced .or eliminated T F Blow molding is an important industrial process for making one- piece hollow plastic parts with thick .walls T Sly The sequence of the Blow Molding is automated and often integrated with downstream operations such .as bottle filling and labeling T لنقطة واحدة
In sand moulding process, a rammer is a. A device for measuring moisture content in foundry sand O b. A tool used in foundry to pack the sand in mould O c. A tool used in foundry for repairing the mould O d. A tool used in foundry for cleaning of castings Which of the following helps to prevent the impurities and foreign m a
6. The part of gating system which regulates the rate of pouring of molten metal in the mold is called 7. High refractoriness of a material refers to its. b. Chemical strength towards other material d. Ability to get dissolved in molten metal a. Slipperiness of the material c. Strength to withstand high temperature e. None of the above Your answer is: . 8. Usually weaker constituent of a composite is called . 9. Which polymer is the most important commercially: a. thermoplastics c. elastomers b. thermosets d. all of the above e. None of the above Your answer is: 10. Which of the following casting processes are expendable mold operations: a. centrifugal casting c. investment casting e. sand casting b. die casting d. low pressure casting f. None of the above Your answer is: