Upon uniaxial compressive loading at 500 °C (T/T_m = 0.67, where T_m is the absolute melting point), the n-type Skutterudite alloy Yb_0.3Co₄Sb₁₂ deforms plastically by creep via a power-law, with a stress exponent ∼3 consistent with dislocation viscous glide. An activation energy of 171 kJ/mol is measured over the temperature range of 500–587 °C (T/T_m = 0.67–0.75) at a stress of 30 MPa. Yb_0.3Co₄Sb₁₂ is ductile at 500 °C, exhibiting a compressive strain of 25% when subjected to stresses ranging from 22 to 90 MPa for up to 28 days. Among the thermoelectric materials tested so far for creep, Yb_0.3Co₄Sb₁₂ exhibits a creep resistance intermediate between low-melting (Bi₂Te₃, TAGS-85) and high-melting thermoelectrics (Mg₂Si and ZrNiSn). A relatively modest drop in the figure of merit zT, from 0.67 to 0.52, is displayed by Yb_0.3Co₄Sb₁₂ after accumulating 3.7% compressive creep strain at 500 °C, mostly due to a drop in electrical conductivity.

在500°C的单轴压缩载荷下（T / T _m  = 0.67，其中T _m为绝对熔点），n型Skutterudite合金Yb _0.3 Co ₄ Sb ₁₂通过幂律蠕变塑性变形，其屈服强度为应力指数〜3与位错粘性滑移一致。在500-587°C（T / T _m  = 0.67-0.75）的温度范围内，在30 MPa的应力下测得的活化能为171 kJ / mol 。Yb _0.3 Co ₄ Sb ₁₂在500°C时易延展，当承受22至90 MPa的应力达28天时，表现出25％的压缩应变。在迄今为止测试的蠕变热电材料中，Yb _0.3Co ₄ Sb ₁₂在低熔点（Bi ₂ Te ₃，TAGS-85）和高熔点热电材料（Mg ₂ Si和ZrNiSn）之间表现出耐蠕变性。Yb _0.3 Co ₄ Sb ₁₂在500°C下累积了3.7％的压缩蠕变应变后，品质因数zT的相对适度的下降从0.67下降至0.52 ，这主要是由于电导率的下降。