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Nitrides, Silicides and Sulfides
Nitrides contain very high melting point but initiate to oxidize at low temperature. They have poor resistance also to chemicals. Boron nitride have a graphite structure and thus exhibit lubricating properties. A type of boron carbide identified as Borazon produced via compressing beneath high pressure of 68000 atmospheres at a temperature above 1700oC has hardness equivalent to such of diamond. Borazon also has a excellent resistance to oxidation and can withstand a temperature of 1950oC.
Instantaneous stress and elongation: What shall be the instantaneous stress & elongation of a 25 mm diameter bar, 2.6 m long, suspended vertically, if any mass of 10 kg falls
Ask question #Minimum 100 whow to detect the presence of 2nd group basic radicals ?ords accepted#
In case of welded vessels why is stress relieving in the form of post-weld treatment necessary? When a metal is welded together the point at which two surfaces are joined are s
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Ratio of applied stress: What should be the ratio of applied stress, s, to yield stress s Y in a large thin plate so that plastic spread along lint of crack is equal to 1 /1
(a) Describe and explain the Zeroth law of thermodynamics. Why it is so called ? What is understand by fixed points of a thermometric scale ? (b) In what respects are the work a
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Creep: Creep of rails is the forward movement of rails in the direction of dominant traffic over a period of time. Creep is undesirable because it disturbs the gauge of the t
Controls for resistance welding machines The main controls required for a resistance welding machine are: i. Initiation and termination of the current. ii. Controlling the mag
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