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Results 3971 - 3980 of 4003 for Hydrogen
  • Article - 19 Apr 2013
    Silver sulfide is a dense black solid that is insoluble in all solvents, but is degraded by strong acids. It features a covalent bond, as it is made up of silver and sulfur.
  • Article - 9 Nov 2012
    Super alloys are also called high performance alloys. They have the capacity to function under very high temperatures and severe mechanical stress, and also where high surface stability is required.
  • Article - 25 Oct 2012
    Super alloys are also known as high performance alloys. They contain many elements in a variety of combinations so as to achieve desired results. These alloys can function at very high temperatures...
  • Article - 5 Sep 2012
    Alloy steels are designated by AISI four-digit numbers. They are more responsive to mechanical and heat treatments than carbon steels. They comprise different types of steels with compositions which...
  • Article - 2 Jul 2012
    AISI 1045 steel is a medium tensile steel supplied in the black hot rolled or normalized condition. It has a tensile strength of 570 - 700 MPa and Brinell hardness ranging between 170 and 210.
  • Article - 28 Jun 2012
    AISI 4140 is a chromium-molybdenum alloy steel, the chromium content provides good hardness penetration, and the molybdenum content ensures uniform hardness and high strength.
  • Article - 12 Jun 2012
    Since prehistoric days, humans have been aware of the presence of carbon. When the cave people made a fire, they saw the formation of smoke.
  • Article - 19 Aug 2009
    A new systematic definition and the category of hybrid materials are proposed in this paper. The categories are (1) structurally-hybridized materials, (2) materials hybridized in chemical-bond, and...
  • Article - 30 Apr 2009
    Tin dioxide based varistor ceramics SnO2-Co3O4-Nb2O5-Cr2O3-xCuO (x=0; 0.05; 0.1 and 0.5) were made and their electrical properties were studied.
  • Article - 25 Apr 2009
    Advanced adhesives can improve the assembly of disposable and reusable medical devices.