Microstructure control through processing

Through a proper control of processing and microstructure of these steel... 

In the discussion given above, we have illustrated the sense in which interfaces can alter material properties. The entirety of all interfaces found within a given material forms one of the key backbones of that material s microstructure. Indeed, much of the actual business of microstructural control takes place at interfaces, either by eliminating them through processes such as grain growth, or by intentionally creating them such as in processes like the carburization of steel. 

The process patented by Newkirk and his associates (more than 60 patents were filed in the period 1985-90) covered both the composition of the aluminum alloy (now to be used as a raw material for the manufacture of the DMO product), the use of an initiator (to promote nucleation of the growth process), control of the growth rate and microstructure (primarily through the composition, structure,... 

The magnetic, optical, and electrical properties of materials often depend on the microstructural details and the morphology of materials. Even if the final state is not a colloid, many products pass through colloidal processing routes prior to the final stage. The availability of methods to produce model particles allows us to study and control the desired properties of the final product. 

In this chapter, we describe the synthesis and characterisation of the microstructure and properties of layered-graded alumina-matrix composites through liquid infiltration. This approach is relatively simple and offers excellent control over the depth of the graded layer. The presence of a graded dispersion of reinforced particles in the alumina matrix has a profound influence on the physical and mechanical properties of the composites. An overview of the infiltration kinetics and the use of the infiltration process as a new philosophy for tailoring novel graded ceramic systems are also presented. 

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