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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.
Q. What is Injection moulding? An important industrial method of producing articles of thermoplastics is injection moulding. The moulding material is loaded into a hopper from
Find the tension in the thread: A thread is wound round a heavy homogeneous cylinder of mass m and radius. The cylinder is permitted to fall from rest and unwinds the thread.
A simply supported beam ABC with supports at A and B , 6m apart and with an overhang BC 2 metres long takes uniformly distributed load of 1.5 KN/metre length over the entair length
Q. Categorization of Geometric models? Modern CAD systems define objects in 3-D. Thus, the designer can construct 3-D model of objects conveniently and store the database of th
Types of Brake The brakes used in motorcycles can be classified as follows: (a) Drum Brake (b) Disc Brake
Driving mechanism I). Knurl or Friction Drive : This has either the upper or lower electrode (or both) driven by a friction wheel on the periphery of the electrode. A co
how to write the full lab report on this topic??
ARC WELDING POWER SOURCES CLASSIFICATION:OUTPUT CHARACTERSTICS The output characteristic of welding power source is a funct ional relationship between output voltage and load
TEMPERING: The hardening treatment specified to steel raises the hardness but initiates internal stresses due to different cooling rates. The internal stresses are created al
How can I achieve a back and forth movement of carriage system. How can I reverse the motor to go back and forth.
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