Co-firing of biomass with coal: constraints and role of biomass pretreatment

This report aims at introducing the aspects of co-firing of biomass with coal. The main focus is given to problems and constraints related to utilizing biomass together with coal for power generation, and the potential of biomass pre-treatment in mitigating these constraints. The work is based on a review of literature sources on the subject

Interphases in Si3N4/Ni-Cr alloy joints

Microchem. and microstructures of interfaces in Si3N4/Ni-Cr alloy joints were investigated. The reaction products and resultant interphases have been characterized. These phases were related to the exptl. detd. phase diagrams of the Ni-Cr-Si-N system. Combined with thermodn. and diffusion data, predictions are made on the nature and extent of the reactions. Based on this information, the optimum bonding conditions and causal relations between joining practice and joint performance were established. [on SciFinder (R)

Interphases in Si3N4/Ni-Cr alloy joints

Microchem. and microstructures of interfaces in Si3N4/Ni-Cr alloy joints were investigated. The reaction products and resultant interphases have been characterized. These phases were related to the exptl. detd. phase diagrams of the Ni-Cr-Si-N system. Combined with thermodn. and diffusion data, predictions are made on the nature and extent of the reactions. Based on this information, the optimum bonding conditions and causal relations between joining practice and joint performance were established. [on SciFinder (R)

Interphases in Si3N4/Ni-Cr alloy joints

Microchem. and microstructures of interfaces in Si3N4/Ni-Cr alloy joints were investigated. The reaction products and resultant interphases have been characterized. These phases were related to the exptl. detd. phase diagrams of the Ni-Cr-Si-N system. Combined with thermodn. and diffusion data, predictions are made on the nature and extent of the reactions. Based on this information, the optimum bonding conditions and causal relations between joining practice and joint performance were established. [on SciFinder (R)

The brazing of Si3N4 with Ni-Cr-Si alloys

The use of commercially available and laboratory made Ni-Si-Cr brazes for wetting and bonding Si3N4 has been explored. The microstructure and chemistry of brazed joints has been characterized by techniques such as optical microscopy, scanning electron microscopy, electron probe micro-analysis and X-ray diffraction. Si3N4 was wetted well by all the braze alloys at 1150–1200 °C, but the joint quality obtained was poor because of the formation of brittle phases and solid solutions