Výsledky vyhledávání - "Toshio Nagasawa"

Mechanical properties of polyethylene crystals. II. Deformation process of spherulite

Autor: Keinosuke Kobayashi, Toshio Nagasawa

Publikováno v: Journal of Polymer Science Part C: Polymer Symposia. 15:163-183

Optical and electron microscopy of the plastic deformation process of polyethylene spherulitic film revealed the variation of the process with the temperature. Even within a single spherulite the mode of deformation differs with the relative position

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6681e4ecf90f427f958768e3ccb6ac1a
https://doi.org/10.1002/polc.5070150113

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A general process for in situ formation of functional surface layers on ceramics

Autor: Toshihiro Ishikawa, Teruaki Fujii, Hiroyuki Yamaoka, Toshio Nagasawa, Yoshikatsu Harada

Publikováno v: Nature. 416:64-67

Ceramics are often prepared with surface layers of different composition from the bulk1,2, in order to impart a specific functionality to the surface or to act as a protective layer for the bulk material3,4. Here we describe a general process by whic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abdf1d037936f2d03936f76d1a1f64fe
https://doi.org/10.1038/416064a

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Characteristics of a Ceramic Matrix Composite using a Continuous Si-Ti-C-O Fiber

Autor: Mitsuhiko Sato, Toshio Nagasawa, Hideki Ohtsubo, Toshihiro Ishikawa, Takemi Yamamura, Masaki Shibuya, Kiyohito Okamura

Publikováno v: 14th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings

A new type of ceramic matrix composite using plane webs or unidirectional sheets of the Si-Ti-C-O fiber, which can be obtained from polytitanocarbosilane, was successfully fabricated by the hot-pressing method at 1800-1950 C. The effects of the diffe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::316be6c8829525c8b6fb0b01c426ad6a
https://doi.org/10.1002/9780470313053.ch39

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A New Type of Ceramic Matrix Composite Using Si-Ti-C-O Fiber

Autor: Toshio Nagasawa, Masaki Shibuya, Takemi Yamamura, Toshihiro Ishiawa, Kiyohtto Okamura, Tamura Makoto

Publikováno v: A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings

A novel ceramic matrix composite using Si-Ti-C-O fiber and inorganic materials, which can be produced from polytitanocarbosilane, was successfully obtained by the hot-pressing method at 1950 C because Si-Ti-C-O fiber kept a fibrous shape up to 2000 C

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5cd03a7c792afb995dcfd3e7e00e891c
https://doi.org/10.1002/9780470310557.ch22

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A Tough, Thermally Conductive Silicon Carbide Composite with High Strength up to 1600°C in Air

Autor: Yasuhiko Kohtoku, Toshihiko Hogami, Toshihiro Ishikawa, Toshio Nagasawa, Shinji Kajii, Kenji Matsunaga

Publikováno v: Science. 282:1295-1297

A sintered silicon carbide fiber-bonded ceramic, which consists of a highly ordered, close-packed structure of very fine hexagonal columnar fibers with a thin interfacial carbon layer between fibers, was synthesized by hot-pressing plied sheets of an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::002ac30891e7a594deb1409e7670a476
https://doi.org/10.1126/science.282.5392.1295

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High-strength alkali-resistant sintered SiC fibre stable to 2,200 °C

Autor: Toshio Nagasawa, Takemi Yamamura, Kiyoshi Kumagawa, Toshihiro Ishikawa, Yasuhiko Kohtoku

Publikováno v: Nature. 391:773-775

The high-temperature stability of SiC-based ceramics has led to their use in high-temperature structural materials and composites1,2,3. In particular, silicon carbide fibres are used in tough fibre-reinforced composites. Here we describe a type of si

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f5dd892a4480f8525023b77d41f38856
https://doi.org/10.1038/35820

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Molecular evidence for human alpha 2-HS glycoprotein (AHSG) polymorphism

Autor: Toshio Nagasawa, Tamotsu Ohki, Sanae Takeichi, Tsuneo Suzuki, Kazuo Umetsu, Motoki Osawa

Publikováno v: Human genetics. 99(1)

Alpha 2-HS glycoprotein (AHSG) is a human plasma glycoprotein that exhibits genetic polymorphism on isoelectric focusing (IEF). To identify the origin of two common alleles, AHSG*1 and *2, we examined nucleotide exchanges in the gene. AHSG cDNA was o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2930dfbf91453e4db1d15797f83bd88e
https://pubmed.ncbi.nlm.nih.gov/9003486

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On the Crystallization of Polymer Under a Stress

Autor: Toshio Nagasawa

Publikováno v: Sen'i Gakkaishi. 31:P309-P316

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bce701a69cfe0c384c300231b7fff058
https://doi.org/10.2115/fiber.31.10_p309

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Mechanism of formation of shish kebab structures

Autor: Toshio Nagasawa, Yasushi Shimomura

Publikováno v: Journal of Polymer Science: Polymer Physics Edition. 12:2291-2308

To describe the characteristic crystalline structure of polyolefins, Pennings first proposed a model consisting of a combination of an extended chain crystal (a “shish”) and folded chain crystals (“kebabs”). In Pennings' model the “shish”

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::768017f6da6787053c358edfa6c93442
https://doi.org/10.1002/pol.1974.180121108

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