Fabrication of AlN ceramics with high performance and reliability by low-temperature, short-time sintering process

• Project/Area Number: 15K21421
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Material processing/Microstructural control engineering; Inorganic materials/Physical properties
• Research Institution: Tokyo City University
• Principal Investigator: Kobayashi Ryota 東京都市大学, 工学部, 准教授 (30548136)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: セラミックス / 窒化アルミニウム / ウィスカー / 組織制御 / 放電プラズマ焼結 / 熱伝導性

Outline of Final Research Achievements

Dense and fine AlN ceramics were fabricated at lower sintering temperature for shorter sintering time by spark plasma sintering with low-temperature sintering additives containing small amount of boron. In addition, AlN whiskers synthesized by direct nitridation of Al containing melt were added to raw powders to control the textures of AlN ceramics. The effects of AlN whisker addition to the densification, thermal conductivity, and mechanical strength of AlN ceramics were also evaluated.

Research Products

• [Journal Article] Synthesis of AlN needles by nitridation of Al–Si melt (2016)
  • Author(s): Ryota Kobayashi, Yuuki Fukutomi, Takayuki Takagi
  • Journal Title: Journal of the Ceramic Society of Japan Volume: 124 Issue: 10 Pages: 1161-1163
  • DOI: 10.2109/jcersj2.16137
  • NAID: 130005605996
  • ISSN: 1348-6535, 1882-0743
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Fabrication, Microstructure, and Thermal Conductivity of AlN Whisker/AlN Composite Ceramics (2016)
  • Author(s): 小林亮太, 高木豪之, 福富友貴, 岩本尚土, 野口陽平
  • Journal Title: Journal of the Society of Powder Technology, Japan Volume: 53 Issue: 12 Pages: 820-823
  • DOI: 10.4164/sptj.53.820
  • NAID: 130005290147
  • ISSN: 0386-6157, 1883-7239
  • Peer Reviewed
• [Journal Article] Densification of AlN ceramics by spark plasma sintering under 1550^oC (2016)
  • Author(s): Ryota Kobayashi, Yoshihiro Nakajima, Kenji Mochizuki, Koichi Harata, Takashi Goto, Kentaro Iwai, Junichi Tatami
  • Journal Title: Advanced Powder Technology Volume: 未定 Issue: 3 Pages: 860-863
  • DOI: 10.1016/j.apt.2015.12.014
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] 低熱伝導鉄系合金/高熱伝導窒化物コンポジット材料における自己組織化と熱伝導特性 (2017)
  • Author(s): 根本一宏, 大久保和也, 手嶋彬人, 小林亮太 宗像文男
  • Organizer: 第55回セラミックス基礎科学討論会
  • Place of Presentation: 岡山コンベンションセンター（岡山県）
  • Year and Date: 2017-01-12
• [Presentation] AlNセラミックスの微構造と特性に及ぼすAlN針状結晶添加の影響 (2017)
  • Author(s): 小林亮太, 橋本怜, 岡崎裕也, 阿部海里
  • Organizer: 日本セラミックス協会第30回秋季シンポジウム
• [Presentation] 粗大粒子を含むAlNセラミックスの緻密化 (2017)
  • Author(s): 小林亮太, 岡崎裕也, 阿部海里, 橋本怜, 原田晃一, 後藤孝
  • Organizer: 第22回通電焼結研究会
  • Invited
• [Presentation] 放電プラズマ焼結を駆使したAlNセラミックスの超低温・短時間焼結 (2016)
  • Author(s): 小林亮太, 岩本尚土, 高木豪之, 福富友貴, 中島由博, 原田晃一, 後藤孝
  • Organizer: 第21回通電焼結研究会
  • Place of Presentation: 東北大学金属材料研究所（宮城県）
  • Year and Date: 2016-12-01
  • Invited
• [Presentation] AlN/AlNウィスカー複合セラミックスの作製と特性評 (2016)
  • Author(s): 小林亮太, 高木豪之, 福富友貴, 岩本 尚土, 原田晃一, 後藤孝
  • Organizer: 日本セラミックス協会第29回秋季シンポジウム
  • Place of Presentation: 広島大学東広島キャンパス（広島県）
  • Year and Date: 2016-09-07
• [Presentation] 窒化アルミニウムの緻密化と熱伝導性に及ぼすウィスカー添加の影響 (2016)
  • Author(s): 小林亮太, 岩本尚土, 福富友貴, 高木豪之
  • Organizer: 粉体工学会2016年度春期研究発表会
  • Place of Presentation: 京都リサーチパーク（京都府）
  • Year and Date: 2016-05-17
• [Presentation] 高熱伝導性を持つ窒化物セラミックスの低温焼結と組織制御 (2015)
  • Author(s): 小林亮太
  • Organizer: 第25回日本MRS年次大会
  • Place of Presentation: 横浜開港記念会館（神奈川）
  • Year and Date: 2015-12-08
  • Invited
• [Presentation] Densification of AlN Ceramics by Spark Plasma Sintering at 1450^oC (2015)
  • Author(s): Ryota Kobayashi, Yoshihiro Nakajima, Kenji Mochizuki, Koichi Harata, Takashi Goto, Kentaro Iwai, Junichi Tatami
  • Organizer: ICCCI2015
  • Place of Presentation: 倉敷ロイヤルアートホテル（岡山）
  • Year and Date: 2015-07-10
  • Int'l Joint Research