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Article
Fabrication of c-axis oriented higher manganese silicide by a high-magnetic-field and its thermoelectric properties
We report the preparation and thermoelectric properties of oriented higher manganese silicide (HMS) with a composition of MnSi1.73 bulk. The grain alignment and densification were achieved by rotating high magnet...
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Article
Fabrication of c-axis oriented polycrystalline ZnO by using a rotating magnetic field and following sintering
We succeeded in fabricating c-axis (00l) oriented ZnO ceramics by using a rotating magnetic field and a subsequent sintering treatment. The degree of orientation in the green compact was about 0.5 along (00l) on ...
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Article
Liquid immersion technique coupled with infrared microscopy for direct observation of internal structure of ceramic powder compact, with alumina as an example
Infrared microscopy was applied to observe the internal structure of alumina powder compact, which was made transparent with an immersion liquid. It provided clear images of nonuniformity in the structure for ...
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Article
Characterization of processing pores and their relevance to the strength in alumina ceramics
Characterization of bulk defects was successfully accomplished in alumina with a transmission optical microscope. The characterization technique used is based on the fact that many ceramics are essentially tra...
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Article
Binder surface segregation during spray drying of ceramic slurry
Spray-dried granules were observed by a laser microscopy with the immersion liquid technique. The binder distribution in the granules was analyzed from light intensity profiles of the images. The results showe...
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Article
Complex beam epitaxy of metal oxide films
YBa2Cu3O7 films were prepared by the new deposition technique ”complex beam epitaxy”. In this technique, metal-EDTA complexes are evaporated by excimer laser ablation. The metal-EDTA complexes are decomposed by ...
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Chapter
Effect of Packing Structure of Powder Particles in A Ceramic Green Body on Microstructure Development During Densification
Properties of virtually all ceramics are severely degraded by the presence of defects, which develop from powder packing irregularities in green bodies during the densification process.1–3 To produce good ceramic...
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Article
Microstructure design of HIPed TiO2 ceramics for improved corrosion resistance
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Article
High strength, electrically conductive pore-free TiO2 ceramics made by hot isostatic pressing
A high-purity, single-phase TiO2 ceramic with high density, strength, and electrical conduction was developed as a key structural material for the production equipment of semiconductors. Green bodies were made of...
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Article
Change of internal/pore structure in alumina green body during initial sintering
A novel characterization method was applied to study the morphological changes of large pores in a ceramic green body during the early stage of densification at 1100°C for 1–64 h. Large processing pores were p...
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Article
Filter cake forming and hot isostatic pressing for TZP-dispersed hydroxyapatite composite
The combination of a filter cake forming process and hot isostatic pressing was applied to prepare hydroxyapatite composites containing dispersed tetragonal zirconia polycrystal (TZP) with high strength and to...
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Chapter
The Effects of Grain Size on Strength, Fracture Toughness, and Static Fatigue Crack Growth in Alumina
Three point bending, fracture toughness and static fatigue crack growth tests of alumina specimens with various grain sizes were carried out to investigate the effects of grain size on bending strength, fractu...
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Chapter and Conference Paper
Direct Observation on the Pore Elimination During Hip
Changes of pore size and shape during encapsulation HIP was examined directly with the novel liquid immersion technique, which can reveal great details of micro-structure and characterize flaw-forming defects ...
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Chapter and Conference Paper
Effect of Processing on the Micro-Structure and Properties of Hot Isostatically Pressed Alumina Added with Rare-Earth Elements
To control the formation of defects and development of uniform microstructure in powder compact during hot isostatic pressing, the effects of solvent and drying method were examined. Freeze dried powder mixtur...
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Article
Effect of Applied Pressure of Hip on the Removal of Processing Void in Alumina Ceramics and the Resultant Improvement of Mechanical Property
Alumina ceramics prepared at various processing conditions were subjected to hot isostatic pressing (HIP) to remove processing-originated voids. Transmission optical microscope was used for characterizing void...
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Article
Direct Evidence on the Elimination of Pore by the Applied Pressure in Hot Isostatic Pressing of Alumina
Removal of natural pore during capsule hot isostatic pressing (HIP) and normal sintering were examined directly with the novel liquid immersion technique, which can reveal details of micro-structure and charac...
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Article
Direct observation of internal structure in spray-dried yttria-doped zirconia granule
Spray-dried yttria-doped zirconia granules were made transparent by immersion in a liquid and the internal structure was characterized using an optical microscope. This unique technique was found to be applica...
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Article
Hydrogen post-etching effect on CVD diamond film
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Article
Thermochemical etching effect on CVD diamond film in an oxygen atmosphere
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Chapter
Development of Direct Observation Method for Internal Structure in Silicon Nitride Granule and Green Body
Silicon nitride granule and green body were made transparent by immersion liquid which have a refractive index close to that of silicon nitride. Their internal structures were examined directly by means of opt...
