2025年04月06日 星期日 首页   |    期刊介绍   |    编 委 会   |    投稿指南   |    期刊订阅   |    统合信息   |    联系我们
计量学报  2011, Vol. 32 Issue (z1): 58-61    DOI: 10.3969/j.issn.1000.1158.2011.z1.16
  本期目录 | 过刊浏览 | 高级检索 |
Co-C共晶高温固定点灌注研究
王建华1,肖常志1,2,董伟2,王铁军2,刘志峰1
1.北京工业大学机电学院,北京 100124
2.中国计量科学研究院,北京 100013
The Development of the Co-C Eutectic High-temperature Fixed-point
WANG Jian-hua1,XIAO Chang-zhi1,2,DONG Wei2,WANG Tie-jun2,LIU Zhi-feng1
1.Beijing University of Technology, Beijing 100124,China
2.National Institute of Metrology, Beijing 100013,China
全文: PDF (827 KB)   HTML (1 KB) 
输出: BibTeX | EndNote (RIS)      
摘要 介绍了一种基于延长石墨衬套和预先形成共晶体的灌注新方法。为改善沿固定点的温度梯度,同时避免相变过程中的热应力集中,坩埚设计上引入混合结构,即在石墨衬套和坩埚间引入导热各向异性的高纯石墨箔。同时采用延长型石墨衬套,有效地减少灌注次数,降低外界杂质引入的可能。国际温度咨询委员会辐射测温工作组(CCT-WG5)对于定义热力学温度用最高等级Co-C固定点的要求重复性在20 mK以内,熔化结束温度与起始温度差<120 mK。基于新灌注方法灌注的Co-C共晶高温固定点,初步复现结果表明,相变温度1324.054℃,其短期重复性在9 mK以内,熔化结束温度与起始温度差<110 mK,满足CCT-WG5对固定点的要求。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
王建华
肖常志
董伟
王铁军
刘志峰
关键词 计量学辐射测温高温固定点Co-C共晶灌注    
Abstract:A new construction method based on an extended graphite sleeve and pre-forming eutectic is describedIn order to improve the temperature gradient along the HTFP cell and avoid thermal stress concentration in the process of phase transition, the crucible is designed hybrid structure, namely, placing the high purity graphite foil with anisotropic thermal conductivity between the graphite sleeve and crucible.Meanwhile it can reduce the filling times effectively which can decrease the introduced external contaminants by using the extended graphite sleeve.CCT-WG5 (Consultative Committee for Thermometry, Working Group 5: Radiation Thermometry) for the definition of thermodynamic temperature with the highest level of Co-C eutectic HTFP demands the repeatability is better than 20 mK and the difference between the initial temperature and the end temperature of melting is less than 120 mK.A new Co-C eutectic HTFP was constructed based on the new filling method, and the preliminary results show that the phase transition temperature is 1324.054oC, short-term repeatability is better than 9 mK, and the difference between the initial temperature and the end temperature of melting is less than 110 mK, which meet the CCT-WG5 requirements for the HTFPs.
Key wordsMetrology    Radiation thermometry    High temperature fixed-point    Cobaltcarbon eutectic    Filling
    
PACS:  TB942  
作者简介: 王建华(1963-),女,山西大同人,北京工业大学副教授,主要从事数字化制造的研究。wjh@bjut.edu.cn
引用本文:   
王建华,肖常志,董伟,王铁军,刘志峰. Co-C共晶高温固定点灌注研究[J]. 计量学报, 2011, 32(z1): 58-61.
WANG Jian-hua,XIAO Chang-zhi,DONG Wei,WANG Tie-jun,LIU Zhi-feng. The Development of the Co-C Eutectic High-temperature Fixed-point. Acta Metrologica Sinica, 2011, 32(z1): 58-61.
链接本文:  
http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000.1158.2011.z1.16     或     http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2011/V32/Iz1/58
京ICP备:14006989号-1
版权所有 © 《计量学报》编辑部
地址:北三环东路18号(北京1413信箱)  邮编:100029 电话:(010)64271480
本系统由北京玛格泰克科技发展有限公司设计开发  技术支持:support@magtech.com.cn