Characteristics, Advantages, Uses, Applications
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
Ceramic fibers comprise a wide range of amorphous or crystalline synthetic mineral fibers characterized by their refractory properties (i.e., stability at high temperatures).
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
The great majority of ceramic products, are highly resistant to all chemicals except hydrofluoric acid and to some extent, hot caustic solutions.
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
Electrical properties depends upon composition, texture, size and density of material and also on temperature and time. These factors greatly influence the electrical behavior of a ceramic material
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
The mechanical behaviour of ceramic phases is determined in a number of ways depending upon how the force is applied: compressive, tensile, transverse, torsional shear or impact.
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
Since the ceramic materials contain relatively few electrons, their thermal properties differ from that of metals. The most important thermal properties of ceramic materials are
Hot isostatic pressure
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
The Hot Isostatic Press (HIP) uses the simultaneous application of heat and pressure. We refer to this process as HIPing and the product as being HIPed.
Operation, Different methods
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
In isostatic pressing method, a uniform pressure is applied on all sides. The raw material is filled in rubber mold and it is sealed with plate and metal mandrel. The sealed rubber mold is inserted into liquid.
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
These are usually regarded super, cooled liquids. Their molecules are not arranged in regular geometric shapes.
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
These have simple crystal structure, such as aluminium oxide (corundum), magnesium oxide, silicon carbide. Most of the oxides can be considered packing of oxygen ions with the cations occupying the tetrahedral and / or octahedral sites in the structure.
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
A general classification of ceramics is difficult to make, because of the great versatility of these materials. However, ceramics may be classified as given below:
New Engineering Materials
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
Most of the ceramics are compounds of metallic and non-metallic elements. The crystal structure of ceramics is more complex because at least two elements are involved in making a ceramic compound
Phases, Types, Methods of Processing, Characteristics, Applications, Advantages, Disadvantages
Subject and UNIT: Physics For Civil Engineering: Unit IV: New Engineering Materials
A group of metallic alloys which shows the ability to return to their original shape or size (i.e., alloy appears to have memory) when they are subjected to called shape memory alloys.