In this work the objective is to develop the bilayer structure consisting of hydroxyapatite-alumina (HAp-Al2O3) layer and 3 mol% yttria tetragonal zirconia (TZ-3Y) layer using conventional technique consisting of the simple pressing together with pressureless sintering. In order to obtain the desired characteristics of bilayer structure layer thickness cosintering temperature and Al2O3 addition on successful fabrication of HAp-Al2O3/TZ-3Y bilayer structure are investigated. The results indicated that the HAp-10A/TZ-3Y bilayer structure was successfully fabricated by single-end die pressing the powders in hollow cylindrical graphite die under 60 MPa pressure and further wet-bag isostatically pressing in oil to 300 MPa pressure before sintering at 1200 ˚C for 1 h. It is found that an addition of 10 vol% Al2O3 into the HAp outerlayer is the essential condition to effectively suppress the differences in densification and coefficient of thermal expansion of the two layers during cosintering at 1200 oC for 1 h. The obtained HAp-10A/TZ-3Y bilayered disc has diameter of 21.0 mm HAp-10A outerlayer of 4.5 mm thick and TZ-3Y underlayer of 2.5 mm thick. The XRD pattern of the powders crushed from its HAp-10A outerlayer revealed no transformation into other new phases demonstrating that there is no reaction between HAp and Al2O3 during sintering at 1200˚C. The cross-section morphology of HAp-10A/TZ-3Y bilayered composite obtained from the SEM result revealed the porous structure with good interconnectivity. The high porous structure of the bilayered composite provided high surface area for cell attachment indicative of good cell growth and differentiation. The primary grain sizes of HAp-10A outerlayer and TZ-3Y underlayer were in the range of 1-3 um and 100-500 nm respectively. The hardness of HAp-10A layer and /TZ-3Y layer in bilayer structure varied with different layer thicknesses. Accordingly the results presented in this work demonstrated that the HAp-10A/TZ–3Y bilayered composite fabricated by simple technique has thick HAp-Al2O3 outerlayer and strong interfacial bonding between interface layers which can be tailored for specific applications

This research study investigated the structure and electrical effect of the La3+ and Sm3+ co-modified BaTiO3 ceramics with formula Ba1-(x-y)(LaxSmyTi)O3. The concentration of of x was fixed at 0.010 while that of y varied from 0.010 to 0.040. The ceramics are prepared by a solid-state mixed-oxide technique. The phase formation behavior is studied using x-ray diffraction (XRD) The dielectric properties with temperature are broad as wide temperature rang. Results showed that co-modified BaTiO3 ceramic ratio of 0.010 to 0.020 still tetragonal structure where the A-site is disturbed by a group of rare-earth doped. In addition we also found that the dielectric constant increases with ratio of 0.010 to 0.020 and respond to higher frequencies that can be used in the applications circuit with high frequency.

This study developed the cemented tungsten carbide by steadily sintering at 1430 °C for one hour. The tungsten carbide structure is a long shape. Its grain size has a difference between width and length and there are high distribution of sizes and shapes. In comparison with the work piece which has the similar size of grain structure the milling duration of tungsten carbide is less even though the condition of WC-Co is the same (95% WC – 5% Co). When the sintering of 1400 °C with the identical milling duration is performed. It turned out that both grain structures of the tungsten carbide and the work piece are similar and their grain sizes are slightly different. However when the grain structures are almost the same and sphericity is increased the hardness and wear resistance will also be improved. Therefore the size of grain structure between 1.00 – 3.00 μm with the milling duration of 100 hours will provide a work piece that has a wear resistance according to international standard

Research to develop the studying in the form of E-Book “Subject Fundamental of Drawing the structure of Paperboard Packaging” is done to evaluate the quality of the E-Book and the reaction of the students. The subjects for this research are 100 Undergraduate students and they are studying in the Packaging Design division in the Architectuer and Design department at the Rajamangala University of Technology Phra Nakhon. The title of this research is Package of Environmental Awareness Idea which is theory on Subject Fundamental of Drawing the structure of Paperboard Packaging. Therefore the lesson plant is divided in 7 plants. The results from the quality evaluation forms are very suitable as the researcher hypothesized. The analyzing in a book form was respectful at 3.91. The analyzing in an image form was the best at 4.15 and the last one in an E-Book form was very satisfactory at 3.78 The satisfaction questionnaires are suitable as the researcher assumed as well. The analyzing in a book was at 4.30 the image form was at 4.28 and the E-Book was 4.10 In conclusion quality and the satisfaction factor in this research are very sufficient in all forms; the book the images and the E-Book

The objective of research was to study and analysis the Electric vehicle structure of Rajamangala University of Technology Phra Nakhon. The Electric vehicle designed to save energy protect environment and cognitive development of student by used the computer software help in the design Material selection Finite Element Analysis Appropriability of the Electric Vehicle Structure and di s p l a c e m e n t of the vehicle structure by using the computer program help in the calculation for the Finite Element Method including to the development of engineering skill. The research must to create the Electric vehicle prototype to suitable and the structure have lightweight and strong for the electric vehicle and focuses on energy efficiency and the material of structure used steel pipe. This research can use to other working structure and future vehicle in sustainable. The vehicle has two seats Capable of running speed to 0-80 km/h the weight at the vehicle structure not over 1 0 0 kg. And the material of structure used steel pipe. This researching can use to other working structure and future vehicle in the sustainable.