A STUDY ON THE POROUS TITANIUM COMPACTS HAS A VERY HIGH QUALITY

对多孔钛复合片的研究具有非常高的质量

• 批准号: 62460196
• 负责人: OHNO Takashi
• 金额: $ 4.48万
• 依托单位: Kogakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62460196/
• 关键词: Titanium; Porous Compact; Liquid Phase Sintering; Nitride; 耐食性; 焼結機構; 多孔貭体; 複合粉末

In this study, sintering behavior, the amount and configuration of pores and the permeability in sintered titanium compacts have been investigated. The porous compacts were prepared from titanium powder coated with nickel by chemical plating method. The sintering was carried out at 950-1100ﾟC which is obviously above eutectic temperature in the Ti-Ni system. Therefore, all powders were covered with liquid phase which was formed during the sintering.(1) Remarkable shrinkage occurs at eutectic temperature of 950ﾟC for the Ti-Ni composite powder compacts resulting from the rearrangement of powder particles in assistance with the liquid phase.(2) In this sintering process, connecting the open pores with closed pores easily proceeds owing to the good wetting ability of the liquid phase formed at eutectic temperature. The amount and configuration of pores in the sintered compacts are determined at the same time when the rearrangement of powder particles is completed. Only a little change is expected on further sintering.(3) The permeability of the sintered compacts increases proportionally with increasing the quantity of nickel plated between 7 and 15wt%Ni and the most desirable porous compacts having the largest permeability, suitable size and configuration of pores can be obtained in the composite powder compact containing 15wt%Ni in spite of the decrease in porosity.(4) Corrosion resistance of this compacts against 10%HCL and H_2SO_4 is better than that of CP titanium compacts but the one against 10%HN_3 is a little bit worse.

在这项研究中，烧结行为，孔隙的数量和配置和渗透性在烧结钛压块进行了研究。采用化学镀的方法在钛粉表面包覆镍，制备了多孔压坯。烧结温度为950-1100 ℃，明显高于Ti-Ni系的共晶温度。因此，所有粉末都被烧结过程中形成的液相覆盖。(1)当共晶温度为950 ℃时，Ti-Ni复合粉末压坯发生明显的收缩，这是由于粉末颗粒在液相的辅助下重新排列所致。(2)在该烧结过程中，由于在共晶温度下形成的液相的良好润湿能力，容易进行开孔与闭孔的连接。当粉末颗粒重排完成时，同时确定烧结体中孔的数量和结构。预计进一步烧结后仅会发生微小变化。(3)在7 ~ 15wt%Ni的范围内，随着镀镍量的增加，烧结体的透气性成正比增加，含15wt%Ni的复合粉末烧结体尽管孔隙率降低，但透气性最好，孔隙尺寸和形状合适。(4)在10%HCl和H_2SO_4介质中，该压坯的耐蚀性优于纯钛压坯，但在10%HN_3介质中的耐蚀性稍差。

项目成果

田中良平: "金属材料の辞典" 朝倉書店, 560 (1990)

田中亮平：《金属材料词典》朝仓书店，560（1990）

田中良平他: "金属材料の辞典(一部負担)" 朝倉書店, 560 (1990)

田中良平等：《金属材料辞典（部分付费）》朝仓书店，560（1990）

Takashi Ohno: "Porous Titanium Compacts Prepared from Ti-Ni Composit Powders" SIXTH WORLD CONFERENCE ON TITANIUM Proceedings-part2. 1033-1038 (1989)

Takashi Ohno：“由钛镍复合粉末制备的多孔钛压坯”第六届世界钛会议录-第 2 部分。

大野隆: "チタン多孔質体の焼結状態と拡散組織" 工学院大学研究報告. 61. 1-8 (1986)

大野隆：《多孔钛材料的烧结状态和扩散结构》工学院大学研究报告61. 1-8 (1986)。

大野隆: "チタン-ニッケル複合粉末の共晶反応による焼結" 工学院大学研究報告. 62. 23-29 (1987)

Takashi Ohno：“通过共晶反应烧结钛镍复合粉末”，工学院大学研究报告，62. 23-29 (1987)。