CAJ | 학술논문

在大功率航空发电机等领域,迫切需要研制使用温度超过450℃的高温永磁材料.然而,NdFeB永磁材料使用温度低于80℃,耐高温NdFeB永磁材料的使用温度也低于150℃;商业2:17型Sm_2Co_(17)永磁体使用温度范围低于300℃.近年来,研制使用温度超过450℃的高温永磁材料成为该领域研究的热点问题.本文用粉末冶金的方法,制备了不同z值的Sm(Co_(bal)Fe_(0.1)Cu_(0.1)Zr_(0.04))_z(z=6.5～7.5)合金样品.系统研究了z值对合金结构、磁性能的影响规律.室温下z=7.3的合金矫顽力最大,超过2 400 kA/m;773 K时,z=7.1的合金矫顽力最大,达到640 kA/m.高温条件下合金的磁性能和退磁曲线的方形度降低.合金z值对内禀矫顽力温度系数影响显著,其中z=6.9的合金,内禀矫顽力温度系数最低,仅为-0.052%/℃,z≤6.7或z≥7.1时,均导致内禀矫顽力温度系数增大.
재대공솔항공발전궤등영역,박절수요연제사용온도초과450℃적고온영자재료.연이,NdFeB영자재료사용온도저우80℃,내고온NdFeB영자재료적사용온도야저우150℃;상업2:17형Sm_2Co_(17)영자체사용온도범위저우300℃.근년래,연제사용온도초과450℃적고온영자재료성위해영역연구적열점문제.본문용분말야금적방법,제비료불동z치적Sm(Co_(bal)Fe_(0.1)Cu_(0.1)Zr_(0.04))_z(z=6.5～7.5)합금양품.계통연구료z치대합금결구、자성능적영향규률.실온하z=7.3적합금교완력최대,초과2 400 kA/m;773 K시,z=7.1적합금교완력최대,체도640 kA/m.고온조건하합금적자성능화퇴자곡선적방형도강저.합금z치대내품교완력온도계수영향현저,기중z=6.9적합금,내품교완력온도계수최저,부위-0.052%/℃,z≤6.7혹z≥7.1시,균도치내품교완력온도계수증대.
There is a great demand for high temperature permanent magnet materials which are over 450 ℃ in temperature and can be used in high-power generators in the field of aviation. However, the temperatures for use of NdFeB permanent magnet materials are lower than 80 ℃. Even high temperature NdFeB permanent magnet materials can only be used at temperatures lower than 150 ℃. The temperature range of 2 : 17-Sm_2Co_(17) permanent magnets for business use is below 300 ℃. tn recent years, the development of high tem-perature permanent magnetic materials with using temperatures exceeding 450 ℃ has become a hot issue in the field of study. In this article the Sm(CO_(bal)Fe_(0.1)Cu_(0.1)Zr_(0.04))_z(z = 6.5 ～ 7.5) alloys are prepared by powder met-allurgy. The effect of z value on the structure and magnetic properties of Sm(CO_(bal)Fe_(0.1)Cu_(0.1)Zr_(0.04))_z alloys is studied. The highest room temperature intrinsic coercivity iHe is achieved at more than 2 400 kA/m for z= 7.3. A coercivity of more than 640 kA/m is obtained at 773 K for z=7.1. The temperature coefficient of coer-civity is-0. 052%/℃ for z=6.9. The temperature coefficient of coercivity increases for z≤6.7 or z≥7.1.