Prasanna Kumar - Academia.edu (original) (raw)

Papers by Prasanna Kumar

The paper presents a brief state of the art of advanced ceramics, metal matrix and ceramic matrix... more The paper presents a brief state of the art of advanced ceramics, metal matrix and ceramic matrix composites. The attention is focused on process technologies involved, applications and future of these " potential " materials. Some experimental results are included. The future of advanced materials is related to systems solutions, economical manufacturing processing, diverse markets and new technologies. The new materials will provide the opportunity for growth to a new and healthier balance, with vibrant commercial sector delivering an improved quality of life and stronger technology base. 1. CERAMICS With technological progress, natural materials become insufficient to meet increasing demands on product capabilities and functions. There are many combinations of metallic and non-metallic atoms that can combine to form ceramic components, and also several structural arrangements are usually possible for each combination of atoms. This led scientists to invent many new ceramic materials to meet increasing requirements and demands in various application areas. Advanced furnaces and heat engines played important roles in the success of the industrial revolution, while ceramic materials were essential for thermal insulation of various types of furnaces and engines. Electrically insulating ceramic materials were developed as electrical and electronic technologies matured. As higher and higher frequencies and voltages were used, the demand on ceramic dielectrics became more stringent. Also, new specifications for the magnetic and optical properties of ceramics were developed as a part of the new electronic and electro–optical technology revolution. The technology of ceramics is a rapidly developing applied science in today's world. Technological advances result from unexpected material discoveries. On the other hand, the new technology can drive the development of new ceramics. Currently many new classes of materials have been devised to satisfy various new applications. Advanced ceramics offer numerous enhancements in performance, durability, reliability, hardness, high mechanical strength at high temperature, stiffness, low density, optical conductivity, electrical insulation and conductivity, thermal insulation and conductivity, radiation resistance, and so on. Ceramic technologies have been widely used for aircraft and

The paper presents a brief state of the art of advanced ceramics, metal matrix and ceramic matrix... more The paper presents a brief state of the art of advanced ceramics, metal matrix and ceramic matrix composites. The attention is focused on process technologies involved, applications and future of these " potential " materials. Some experimental results are included. The future of advanced materials is related to systems solutions, economical manufacturing processing, diverse markets and new technologies. The new materials will provide the opportunity for growth to a new and healthier balance, with vibrant commercial sector delivering an improved quality of life and stronger technology base. 1. CERAMICS With technological progress, natural materials become insufficient to meet increasing demands on product capabilities and functions. There are many combinations of metallic and non-metallic atoms that can combine to form ceramic components, and also several structural arrangements are usually possible for each combination of atoms. This led scientists to invent many new ceramic materials to meet increasing requirements and demands in various application areas. Advanced furnaces and heat engines played important roles in the success of the industrial revolution, while ceramic materials were essential for thermal insulation of various types of furnaces and engines. Electrically insulating ceramic materials were developed as electrical and electronic technologies matured. As higher and higher frequencies and voltages were used, the demand on ceramic dielectrics became more stringent. Also, new specifications for the magnetic and optical properties of ceramics were developed as a part of the new electronic and electro–optical technology revolution. The technology of ceramics is a rapidly developing applied science in today's world. Technological advances result from unexpected material discoveries. On the other hand, the new technology can drive the development of new ceramics. Currently many new classes of materials have been devised to satisfy various new applications. Advanced ceramics offer numerous enhancements in performance, durability, reliability, hardness, high mechanical strength at high temperature, stiffness, low density, optical conductivity, electrical insulation and conductivity, thermal insulation and conductivity, radiation resistance, and so on. Ceramic technologies have been widely used for aircraft and