【作者】 昝秀颀； 王德志； 徐兵；

【Author】 ZAN Xiu-qi,WANG De-zhi,XU Bing (School of Materials Science and Engineering,Central South University,Changsha 410083,China)

【机构】 中南大学材料科学与工程学院；

【摘要】 采用机械球磨的方法制备了La₂O₃/MoSi₂复合微粒。运用粉末冶金法制备了纯钼烧结坯及掺杂不同含量La₂O₃/MoSi₂复合微粒的烧结钼坯,并对烧结钼的热膨胀系数和热传导率进行了检测。结果表明,La₂O₃/MoSi₂复合微粒对烧结钼的热膨胀系数、热导率均有较大影响。其中,复合微粒添加量为1%时可明显降低烧结钼的热膨胀系数,添加量为0.5%和1.5%时可提高烧结钼的热导率。更多还原

【Abstract】 La₂O₃/MoSi₂ composite particles were prepared by mechanical milling method.Sintered molybdenum with different addition of La₂O₃/MoSi₂were prepared by powder metallurgy,and their coefficient of thermal expansion and thermal conductivity were detected.The results show that La₂O₃/MoSi₂ composite particles influence the coefficient of thermal expansion,thermal conductivity.When the content of La₂O₃/MoSi₂is 1%the coefficient of thermal expansion dropped clearly,and when the content of La₂O₃/MoSi₂is 0.5%and 0.5%,the thermal conductivity was improved.更多还原