NON-DESTRUCTIVE THERMAL DAMAGE CHARACTERIZATION OF CORDIERITE-MULLITE REFRACTORIES

Thermal Shock Damage Characterization of High Temperature Ceramics by Non Destructive Test Methods

The knowledge of the thermal shock resistance of refractory materials is of outmost importance since it determines their performance in many applications, from ceramic manufacturing to oil refinery, thermal insulation, nuclear power, chemical and petrochemical industries. Thermal shock resistance is measured in terms of the number of cycles that a refractory material can withstand when subjecte...

FPGA-based of Thermogram Enhancement Algorithm for Non-destructive Thermal Characterization

Microstructural characterization of alkali metal mediated high temperature reactions in mullite based refractories

Two types of refractory bricks were used in reaction tests with slag from a production kiln for iron ore pellet production. Electron microscopy was used to characterize morphological changes at the slag/brick interface and active chemical reactions. Phases such as kalsilite, nepheline and potassium β-alumina form, in a layered structure, as a consequence of alkali metals migration in the brick....

THERMO-MECHANICAL DESIGN OPTIMIZATION OF CORDIERITE–MULLITE BASED KILN FURNITURE

Abstract: Cordierite-Mullite based kiln furnitures are widely used in fast-firing of ceramic products because of their low thermal expansion which confer them a very good ability to thermal shock resistance. Difference in CTE of constituent phase can develop damage during thermal cycling due to internal stresses. Increase in industrial competitiveness leads to the development of new means for e...

THERMAL SHOCK OF REFRACTORIES

Being brittle and having low thermal conductivity, refractories suffer damage and sometimes fail in service as a result of thermal shock. While the approach of those making fine-grained technical ceramics is to make their products sufficiently strong to withstand thermal stresses the refractory technologist is more cunning. He uses, often little known, devices to provide resistance to thermal s...

Non-Destructive Evaluation of Composite Thermal Damage with Agilent’s New Handheld 4300 FTIR

Carbon or graphite fi ber composites are replacing metal structures and parts in many industries, such as aerospace, general transportation, high performance automotive, and sporting goods. These materials are favored for their reduced weight and greater strength relative to traditional metal parts. For example, the Airbus A350 and Boeing 787 are both made of approximately 50% composite materia...