PREPARATION OF METAL-TIN NANOCOMPOSITE MATERIALS BY MA AND SHOCK CONSOLIDATION

MA与冲击固结法制备金属锡纳米复合材料

• 批准号: 05650715
• 负责人: YAMASAKI Tohru
• 金额: $ 1.15万
• 依托单位: Himeji Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650715/
• 关键词: nanocrystalline material,; Fe-TiN,; Ni-TiN,; grain size dependence,; mechanical alloying; shock consolidation; high temperature hardness,

Fe-TiN and Ni-Tin nanocrystalline powders were prepared by ball-milling Fe-Ti and Ni-Ti powder mixtures in nitrogen gas, and the milled powders were consolidated by dynamic compaction by using a propellant gun under shock pressures of 38.6 GPa and above. It was found that the hardness of nanocrystalline Fe-63vol.%TiN and Ni-58vol.%TiN dual-phase materials increased with decreasing grain size and reached maximums of Hv=14 GPa, 13GPa and 12GPa at critical grain sizes of 15nm and 10nm, respectively. As the grain size decreased below the critical values, the hardness slightly decreased. the high temperature hardness was also measured at a temperature range from R.T.to 1000K.Softening occurred from low temperatures of about 500K with the grain sizes below 20 nm, and from higher temperatures with larger grain sizes. Softening was believed to occur via diffusional creep. A creep test at constant temperature indicated the existence of a threshould stress in contradiction to the Coble creep.

通过在氮气中球磨 Fe-Ti 和 Ni-Ti 粉末混合物制备 Fe-TiN 和 Ni-Tn 纳米晶粉末，并使用推进剂枪在 38.6 GPa 及以上的冲击压力下对研磨粉末进行动态压实。结果发现，纳米晶Fe-63vol.%TiN和Ni-58vol.%TiN双相材料的硬度随着晶粒尺寸的减小而增加，并在临界晶粒尺寸为15nm和10nm时分别达到Hv=14GPa、13GPa和12GPa的最大值。当晶粒尺寸降至临界值以下时，硬度略有下降。高温硬度也在 R.T. 至 1000K 的温度范围内进行测量。软化发生在晶粒尺寸低于 20 nm 的约 500K 低温下，以及晶粒尺寸较大的高温下。据信软化是通过扩散蠕变发生的。恒温蠕变试验表明存在与科布尔蠕变相反的阈值应力。

项目成果

T.Yamasaki et.al.: "Preparation of Fe-Tin Nanocomposite-powders and their Shock Consolidation" J.of the Jap.Soc.of Powder and Powder Metallurgy. 40. 324 (1993)

T.Yamasaki 等人：“铁锡纳米复合粉末的制备及其冲击固结”J.of the Jap.Soc.of Powder and Powder Metallurgy。

Y.Ogino, T.Yamasaki et al.: "Synthesis of TiN and (Ti, Al)N Powders by Mechanicla Alloying in Nitrogen Gas." Scripta Metallurgica et.Materialia.28. 967 (1993)

Y.Ogino、T.Yamasaki 等人：“在氮气中通过机械合金化合成 TiN 和 (Ti, Al)N 粉末”。

荻野喜清、山崎徹 他: "Synthesis of TiN and (Ti,Al)N Powders by Mechanical Alloying in Nitrogen Gas." Scripta Metallurgica et Materialia. 28. 967-971 (1993)

Yoshikiyo Ogino、Toru Yamazaki 等人：“在氮气中通过机械合金化合成 TiN 和 (Ti,Al)N 粉末”，Scripta Metallurgica et Materialia 28. 967-971 (1993)。

T.Yamasaki, Y.Ogino et al.: "Grain Size Dependence of Hardness of Metal-TiN Nanocomposite Powders Prepared by Mechanical Alloying and Shock Consolidation." Proc, of ISMANAM. (in press).

T.Yamasaki、Y.Ogino 等人：“通过机械合金化和冲击固结制备的金属-TiN 纳米复合粉末的硬度与晶粒尺寸的依赖性。”

荻野喜清,山崎徹,他: "Synthesis of TiN and(Ti,Al)N Powders by Mechanical Alloying in Nitrogen Gas." Scripta Metallurgica et Materialia. 28. 967-971 (1993)

Yoshikiyo Ogino、Toru Yamazaki 等人：“在氮气中通过机械合金化合成 TiN 和 (Ti,Al)N 粉末”，Scripta Metallurgica et Materialia 28. 967-971 (1993)。