Development of Novel Cemented Carbide for Overcoming Rare Metal Crisis by Preparing Nano-Meso Structure-Controlled Tungsten Carbide

• Project/Area Number: 21560751
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Material processing/treatments
• Research Institution: University of Hyogo
• Principal Investigator: MORISHITA Masao 兵庫県立大学, 大学院・工学研究科, 教授 (60244696)
• Co-Investigator(Kenkyū-buntansha): YAMAMOTO Hiroaki 兵庫県立大学, 大学院・工学研究科, 准教授 (40326301)
• Project Period (FY): 2009 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 粉末プロセス / 粉末冶金 / 溶液法 / 気相炭化法 / 二酸化炭素 / アルミニウム廃材 / 省資源 / リサイクル / ナノ構造 / 都市鉱山 / 超硬合金 / タングステン / 炭化物原料 / 新規プロセス / ナノ・メゾ構造

Research Abstract

The WC involving the nano metal cobalt domains has been prepared by a gas-solid reaction between the cobalt non-equilibrium super saturated-tugsten powder and carbon mono-oxide gas (CO). The metal Co domains formed in the WC were found to be spherical with a diameter of approximately 60 nm by observing the microstructure with a high resolution transmission electron microscope. The tungsten less-hard metal prepared from the WC involving the nano metal cobalt domains shows high performance, resulted from its nano-scaled fine structure. Recyle of W and Co from the present hard metal is advantageous due to that it is composed of only WC and Co.

Research Products

• [Journal Article] The Tungsten Carbide Involving the Nano 図 6 分離回収した純金属タングステンの XRD 図形. Metal Cobalt Domains Synthesized by Carburizing the Cobalt Super Saturated-tungsten Powder with CO Gas (2012)
  • Author(s): M. Morishita, H. Yamamoto, T. Okahira, M. Yoshioka, N. Fukumuro, H. Matsuda, M. Ikebe, M. Iwasaki, H. Yanagita, and H. Nishimaki
  • Journal Title: Journal of the America Ceramic Society Volume: Vol.95 Pages: 3797-3801
  • Peer Reviewed
• [Journal Article] The Tungsten Carbide Involving the Nano Metal Cobalt Domains Synthesized by Carburizing the Cobalt Super Saturated-tungsten Powder with CO Gas (2012)
  • Author(s): M. Morishita
  • Journal Title: Journal of the America Ceramic Society Volume: 95 Pages: 3797-3801
  • Peer Reviewed
• [Journal Article] The Tungsten Carbide Involving the Nano Metal Cobalt Domains Synthesized by Carburizing the Cobalt Super Saturated-tungsten Powder with CO Gas (2012)
  • Author(s): M.Morishita, et al
  • Journal Title: J.America Ceramic Society Volume: 95(in press)
  • Peer Reviewed
• [Presentation] 硝酸塩含有溶融アルカリハライドによる超硬合金からのWおよびCoの分離回収 (2013)
  • Author(s): 満武茂樹,村上冬馬,森下政夫,池邉政昭,柳田秀文
  • Organizer: 日本金属学会平成25年度春期講演大会予稿集
• [Presentation] 硝酸塩含有溶融アルカリハライドによる超硬合金からのWおよびCoの分離回収 (2013)
  • Author(s): 森下政夫
  • Organizer: 日本金属学会平成25年度春期大会
  • Place of Presentation: 東京理科大学神楽坂キャンパス
• [Presentation] The Duplex Structured-Cemented Carbide Prepared by Sintering the Tungsten Carbide Involving the Nano Metal Cobalt Domains with Cobalt Binder Phase (2012)
  • Author(s): M. Morishita, H. Yamamoto, T. Okahira, M. Yoshioka, M. Ikebe, M. Iwasaki, H. Yanagita, and H. Nishimaki
  • Organizer: Abstracts of Powder Metallurgy World Congress & Wxhibition PM2012
  • Place of Presentation: Yokohama
• [Presentation] The Duplex Structured-Cemented Carbide Prepared by Sintering the Tungsten Carbide Involving the Nano Cobalt Domains with Cobalt Binder Phase (2012)
  • Author(s): M. Morishita
  • Organizer: Powder Metallurgy World Congress & Wxhibition PM2012
  • Place of Presentation: Pacifico Yokohama Conference Center
• [Presentation] タングステン炭化物内部に生成した金属コバルトドメインの透過電子鏡観察 (2010)
  • Author(s): 岡平季丈、吉岡元秀、森下政夫、山本宏明、池邉政明, 岩崎政弘, 柳田秀文, 西牧宏
  • Organizer: 粉体粉末冶金協会平成22年度秋季講演大会
  • Place of Presentation: 京都大学百周年時計台会館
  • Year and Date: 2010-11-08
• [Presentation] Tungsten Carbide Involving Metal Cobalt Domains Prepared by CO Gas Carburization of Cobalt Super Saturated-tungsten Powder (2010)
  • Author(s): M.Morishita, H.Yamamoto, T.Okahira, N.Saho, M.Ikebe, M.Iwasaki, H.Yanagida, H.Nishimaki
  • Organizer: Discussion Meeting on Thermodynamics of Alloys (TOFA 2010)
  • Place of Presentation: University of Porto, Porto, Portugal
  • Year and Date: 2010-09-13
• [Presentation] 溶液および気相複合プロセスによる金属Co相内包タングステン炭化物の作製 (2010)
  • Author(s): 岡平季丈、佐保直幸、森下政夫、山本宏明、池邉政明, 岩崎政弘, 柳田秀文, 西牧宏
  • Organizer: 粉体粉末冶金協会平成22年度春季講演大会
  • Place of Presentation: 早稲田大学国際会議場
  • Year and Date: 2010-05-27
• [Presentation] Tungsten Carbide Involving Metal Cobalt Domains (2010)
  • Author(s): M. Morishita, H. Yamamoto, T. Okahira, M. Ikebe, M. Iwasaki, H. Yanagita, and H. Nishimaki
  • Organizer: Abstracts of Discussion Meeting on Thermodynamics of Alloys TOFA 2010
  • Place of Presentation: Porto
• [Presentation] Tungsten Carbide Involving Metal Domains Composed of Iron and Manganese (2009)
  • Author(s): 森下政夫, 山本宏明, 尾上愛, 池邉政明, 岩崎政弘, 柳田秀文, 西牧宏
  • Organizer: 13^<th> IUPAC International Conference on High Temperature Materials Chemistry
  • Place of Presentation: University of California at Davis
  • Year and Date: 2009-09-16
• [Presentation] Co-Fe固溶体およびFe-Mn固溶体からなる金属ドメイン内包WC炭化物の作製 (2009)
  • Author(s): 森下政夫, 山本宏明, 尾上愛, 池田奈保子, 池邉政明, 岩崎政弘, 柳田秀文, 西牧宏
  • Organizer: 粉体粉末冶金協会平成21年度春季講演大会
  • Place of Presentation: 京都工芸繊維大学
  • Year and Date: 2009-05-16
• [Presentation] Tungsten Carbide Involving Metal Domains Composed of Iron and Manganese (2009)
  • Author(s): M. Morishita, H. Yamamoto, A. Onoue, M. Ikebe, M. Iwasaki, H. Yanagita, and H. Nishimaki
  • Organizer: Abstracts of 13th International IUPAC Conf. on High Tempearature Materials Chemistry HTMC-13
  • Place of Presentation: Davis
• [Patent(Industrial Property Rights)] WC-Co超硬合金用の溶融塩浴、タングステン、コバルトの分離回収方法 (2012)
  • Inventor(s): 森下政夫、山本宏明、池邉政昭、柳田秀文、上野智之
  • Industrial Property Rights Holder: 兵庫県
  • Industrial Property Number: 2012-208620
  • Filing Date: 2012-09-21
• [Patent(Industrial Property Rights)] WC-Co超硬合金用の溶融塩浴、タングステン、コバルトの分離回収方法 (2012)
  • Inventor(s): 森下政夫
  • Industrial Property Rights Holder: 森下政夫
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2012-208620
  • Filing Date: 2012-09-21
• [Patent(Industrial Property Rights)] 遷移金属内包タングステン炭化物、タングステン炭化物分散超硬合金及びそれらの製造方法 (2009)
  • Inventor(s): 森下政夫、山本宏明、池邉政昭、柳田秀文、西牧宏
  • Industrial Property Rights Holder: 兵庫県
  • Filing Date: 2009-08-19
  • Overseas
• [Patent(Industrial Property Rights)] 遷移金属固溶タングステン合金粉末及びその製造方法 (2009)
  • Inventor(s): 森下政夫、山本宏明、池邉政昭、柳田秀文、西牧宏
  • Industrial Property Rights Holder: 兵庫県
  • Filing Date: 2009-08-19
  • Overseas
• [Patent(Industrial Property Rights)] 遷移金属固溶タングステン合金粉末及びその製造方法 (2009)
  • Inventor(s): 森下政夫
  • Industrial Property Rights Holder: 兵庫県
  • Filing Date: 2009-09-16
  • Overseas
• [Patent(Industrial Property Rights)] 遷移金属内包タングステン炭化物、タングステン炭化物分散超硬合金及びそれらの製造方法 (2009)
  • Inventor(s): 森下政夫
  • Industrial Property Rights Holder: 兵庫県
  • Filing Date: 2009-09-16
  • Overseas