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硬质合金表面Ni-P/纳米Ti(C,N)化学复合镀研究 被引量:2
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作者 赵芳霞 张振忠 +1 位作者 丘泰 陈步荣 《表面技术》 EI CAS CSCD 2005年第2期38-41,共4页
 研究了硬质合金表面Ni P 纳米Ti(C,N)化学复合镀工艺以及热处理对复合镀层性能影响的规律。结果表-);2)较好的明:1)施镀工艺中各因素对镀速影响的显著性顺序是:温度→pH值→纳米Ti(C,N)加入量→χ(Ni2+ H2PO2施镀工艺为:28g L氯化镍、...  研究了硬质合金表面Ni P 纳米Ti(C,N)化学复合镀工艺以及热处理对复合镀层性能影响的规律。结果表-);2)较好的明:1)施镀工艺中各因素对镀速影响的显著性顺序是:温度→pH值→纳米Ti(C,N)加入量→χ(Ni2+ H2PO2施镀工艺为:28g L氯化镍、25.76g L次亚磷酸钠,50g L氯化铵、45g L柠檬酸钠,0.001g LPbCl2,6g L纳米Ti(C,N),pH=10,温度为80℃。3)Ni P 纳米Ti(C,N)复合镀层较优的热处理工艺为:在400℃保温150min。采用所推荐的施镀和热处理工艺,获得了硬度是硬质合金基体硬度的2.16倍的Ni P 纳米Ti(C,N)复合镀层。并对以上结果产生的原因进行了简单讨论。 展开更多
关键词 硬质舍金 Ni—P/纳米ti(c N)化学复合 施镀工艺 热处理
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Ti(C,N)金属陶瓷中纳米粉含量对组织和性能的影响 被引量:9
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作者 刘文俊 郑勇 熊惟皓 《粉末冶金技术》 EI CAS CSCD 北大核心 2005年第5期334-338,共5页
采用真空烧结工艺制备了纳米复合Ti(C,N)基金属陶瓷。研究了纳米TiC、TiN的添加量对金属陶瓷的显微组织、性能的影响,用TEM/EDX和SEM观察试样的微观组织特征和断口形貌。结果表明:随着纳米粉添加量的增加,金属陶瓷晶粒逐渐细化,且分布均... 采用真空烧结工艺制备了纳米复合Ti(C,N)基金属陶瓷。研究了纳米TiC、TiN的添加量对金属陶瓷的显微组织、性能的影响,用TEM/EDX和SEM观察试样的微观组织特征和断口形貌。结果表明:随着纳米粉添加量的增加,金属陶瓷晶粒逐渐细化,且分布均匀,具有内、外环形相的小晶粒和“白芯-灰壳”结构的小颗粒大大增加,粘结相体积分数明显减少;当原始粉末中纳米TiC、TiN的含量占原始粉末中TiC、TiN含量的10%时,金属陶瓷有较发达的撕裂棱和较少的气孔,具有较好的力学性能。 展开更多
关键词 纳米复合ti(c N)基金属陶瓷 纳米粉含量 显微组织 断口形貌 力学性能
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Effect of TiC nanoparticle on friction and wear properties of TiC/AA2219 nanocomposites and its strengthening mechanism 被引量:6
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作者 YANG Yi-long ZHANG Yun +2 位作者 ZHANG Hao-ming LIU Xu-he LI Xiao-qian 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第3期767-779,共13页
TiC nanoparticles reinforced 2219 aluminum matrix composites were successfully prepared by ultrasonic casting, followed by forging and T6 heat treatment. The friction and wear properties of the disc-to-column were stu... TiC nanoparticles reinforced 2219 aluminum matrix composites were successfully prepared by ultrasonic casting, followed by forging and T6 heat treatment. The friction and wear properties of the disc-to-column were studied under four separate normal values of 5, 10, 20 and 30 N. The increasing hardness value of the nanocomposite may be attributed to the large amount of TiC(i.e., 1.3 wt.% and 1.7 wt.%) introduced to the composites. The friction coefficient of the nanocomposite decreased with the increase of TiC nanoparticles(0-1.7 wt.%) under the same load. But the wear resistance of the TiC/AA2219 nanocomposite increased by 30%-90% as compared to the 2219 matrix alloy. And it decreased with the increasing load. The composite with 0.9 wt.% TiC produced the best results in terms of friction and wear because of its relatively higher hardness and perfect ability to retain a transfer layer of a comparatively larger thickness. On the wear surface, some Al2O3particles were found which aided in the development of protective shear regions and improved the wear resistance. The wear mechanism for the TiC/AA2219 nanocomposite was a combination of adhesive and oxidative wear, with the composites containing hard TiC nanoparticles being mainly abrasive. 展开更多
关键词 tic/AA2219 nanocomposite tic nanoparticle wear properties HARDNESS wear mechanism
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