The Study on the fabrication of self-lubricant ceramics with high-hardness and surface modification of metals by their ceramics.

高硬度自润滑陶瓷的制备及陶瓷对金属表面改性的研究。

• 批准号: 13650789
• 负责人: NOSE Masateru
• 金额: $ 2.56万
• 依托单位: Takaoka National College
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650789/
• 关键词: h-BN; Zr-N; Cr-B-N; Ti-N; Pulse Current Pressure Sintering; Tribological characteristics; Reactive sputtering; CrBN; 摩擦磨耗特性; メカニカルアロイング; 硬度; 摩擦係数

We tried to fabricate self-lubricant composite ceramics consisting of transition metal nitride (TiN or ZrN) matrixes and hexagonal boron nitride (h-BN) dispersions. Mixture powders were milled with a planetary ball mill for not more than 180ks. Xray-diffraction patterns for the mixed powder showed that h-BN powder was finely grounded smaller than a submicron level and dispersed by the milling for longer than 36ks. The pulse current pressure sintering (PCPS) method was employed in order to consolidate the mixed powders. Relatively high density consolidation of more than 90% for single ZrN (or TiN) compact was obtained from the sintered compact of ZrN + 5mass % h-BN powders milled for 180ks. The hardness of the sintered compacts decreased with the addition of BN of more than 5 mass%. This result suggests that the sintering of mixed powder could be strongly inhibited by the addition of h-BN.Sliding friction tests between sintered compacts of composite ceramics and SUJ-2 steel ball were performed using a ball-on-disc apparatus, in order to estimate the tribological characteristics of sintered compacts by the friction coefficient evolution. Only a 5% addition of h-BN into the ZrN matrix showed a marked decrease in the friction coefficient to about 0.2, preventing adhesive wear. The sintered compact of ZrN-5 mass% h-BN powders milled for 180ks maintained low friction coefficient for two-times longer compared to the sintered compact of ZrN-5 mass% h-BN mixed powders. However, finer dispersion of h-BN particle under the range of nanometer size is essential to sustain the self-lubricant effect for longer time to be practical.Cr-B, Cr-B-N and Cr-B/Cr-B-N multilayer films were synthesized by reactive sputtering. Cr-B-N films contain Cr2B and h-BN phase with a small amount of other phases. Friction coefficient of Cr-B/Cr-B-N multilayer exhibited an intermediate value of 〜0.45 between those of Cr-B (0.9) and Cr-B-N (0.2).

本文尝试制备了过渡金属氮化物（TiN或ZrN）基体与六方氮化硼（h-BN）弥散相组成的自润滑复合陶瓷。混合物粉末用行星式球磨机研磨不超过180 ks。混合粉末的X射线衍射图表明，h-BN粉末被精细研磨，小于亚微米级，并且通过研磨分散超过36 ks。采用脉冲电流压力烧结（PCPS）方法对混合粉末进行烧结。ZrN +5 mass % h-BN粉末经180 ks球磨后的烧结体，单一ZrN（或TiN）压坯的致密度可达90%以上。烧结体的硬度随着BN添加量超过5质量%而降低。采用球-盘摩擦磨损试验机对复合陶瓷烧结体与SUJ-2钢球进行滑动摩擦试验，通过摩擦系数的变化来评价烧结体的摩擦学特性。只有5%的h-BN添加到ZrN基质中显示出摩擦系数显著降低至约0.2，防止粘着磨损。与ZrN-5 mass % h-BN混合粉末的烧结体相比，球磨180 ks的ZrN-5 mass % h-BN粉末的烧结体保持低摩擦系数的时间长两倍。然而，在纳米尺度范围内，h-BN颗粒的分散性对自润滑效果的长期维持是至关重要的。采用反应溅射法制备了Cr-B、Cr-B-N和Cr-B/Cr-B-N多层膜。Cr-B-N薄膜中含有Cr_2B和h-BN相以及少量其它相。Cr-B/Cr-B-N多层膜的摩擦系数介于Cr-B（0.9）和Cr-B-N（0.2）之间，约为0.45。

项目成果

M. Nose, H. Suzuki, T. Nagae, S. Tomida, M. Yokota and K.Nogi: "Fabrication of ZrN-hBN Composite Ceramics by Pulse Current Pressure Sintering and their Tribological Behavior (in Japanese)"Journal of the Japan Society of Powder and Powder Metallurgy,. Vol.

M. Nose、H. Suzuki、T. Nagae、S. Tomida、M. Yokota 和 K.Nogi：“通过脉冲电流压力烧结制备 ZrN-hBN 复合陶瓷及其摩擦学行为（日文）”Journal of the Japan

野瀬正照, 長柄毅一, 鈴木宏章, 冨田正吾, 横田 勝, 野城 清: "PCPS法による遷移金属窒化物とhBNとの複合セラミックスの作製"粉体および粉末冶金. 49巻10号. 922-927 (2002)

Masateru Nose、Koichi Nagara、Hiroaki Suzuki、Shogo Tomita、Masaru Yokota、Kiyoshi Noshiro：“通过 PCPS 法制备过渡金属氮化物和 hBN 复合陶瓷”粉末和粉末冶金，第 49 卷，第 10 期，922-927。 2002）

M. Nose, T. Nagae, H. Suzuki, S. Tomida, M. Yokota and K. Nogi: "Fabrication of ZrN-hBN Composite Ceramics of Transition Metal Nitride and h-BN by Pulse Current Pressure Sintering (in Japanese)"Journal of Japan Institute of Metals,. Vol.63, No.7. 922-927

M. Nose、T. Nagae、H. Suzuki、S. Tomida、M. Yokota 和 K. Nogi：“通过脉冲电流压力烧结制备过渡金属氮化物和 h-BN 的 ZrN-hBN 复合陶瓷（日语）”

野瀬正照, 鈴木宏章, 長柄毅一, 冨田正吾, 横田 勝, 野城 清: "PCPS法により作製したZrN-hBN複合セラミックスと摩擦摩耗特性"粉体および粉末冶金. 49巻10号. 915-921 (2002)

Masateru Nose、Hiroaki Suzuki、Koichi Nagara、Shogo Tomita、Masaru Yokota、Kiyoshi Noshiro：“PCPS法制备的ZrN-hBN复合陶瓷及其摩擦磨损性能”《粉末与粉末冶金》，第49卷，第10期。915-921。 (2002)