Thermal properties of polycrystalline NdN bulk samples with various porosities
Thermal properties of polycrystalline NdN bulk samples with various porosities
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DOI：
10.1016/j.jnucmat.2007.12.009
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发表时间：
2008-05-15
影响因子：
3.1
通讯作者：
Yamanaka, Shinsuke
中科院分区：
文献类型：
--
作者：
Adachi, Jun;Katayama, Masahito;Yamanaka, Shinsuke
采用放电等离子烧结（SPS）技术制备了不同孔隙率的一氮化钕（NdN）颗粒.由于辐照氮化物燃料中存在NdN，测量了其热膨胀、比热容和热导率，并与一氮化铀（UN）进行了比较。NdN的热膨胀系数和比热容与UN非常相似。无孔隙的NdN的热导率估计从热导率的孔隙率依赖性。与UN的热导率不同，NdN的热导率随着温度的升高而降低。(C)2008 Elsevier B.V.保留所有权利。
Neodymium mononitride (NdN) pellets with various porosities were prepared by a spark plasma sintering (SPS). The thermal expansion, specific heat capacity and thermal conductivity were measured and compared with those of uranium mononitride (UN), because NdN exists in the irradiated nitride fuels. The thermal expansion and specific heat capacity of NdN were very similar to those of UN. The thermal conductivity of the porosity-free NdN was estimated from the porosity dependence of the thermal conductivity. Unlike the case of the thermal conductivity of UN, that of NdN decreased with increasing temperature. (C) 2008 Elsevier B.V. All rights reserved.