Abstract—The influence of the addition of nanodispersed graphene in an amount of 0.05–0.15 wt % on the ultimate compressive strength of the materials based on p-type Bi_0.5Sb_1.5Te₃ and n-type Bi₂Te_2.4Se_0.6 solid solutions is studied. The samples are fabricated by spark plasma sintering of the powders prepared by melt spinning and grinding in a ball mill. All samples are found to undergo brittle fracture. The microstructure of the cleavage of the p-type samples doped with graphene is lamellar, and the grains have pronounced facets. In the n-type materials, the grains have lost their facets and the graphene content increases. The p-type samples doped and undoped with graphene have the same ultimate strength, σ_u = 208 ± 10 MPa. The ultimate strength of the n-type samples doped with graphene is σ_u = 222 ± 10 MPa, and that of the plain sample is σ_u = 167 MPa.

摘要：0.05~0.15 wt%纳米分散石墨烯的添加量对p型Bi _0.5 Sb _1.5 Te ₃和n型Bi ₂ Te _2.4 Se _0.6固溶体材料极限抗压强度的影响被研究。样品是通过对通过熔融纺丝和球磨机研磨制备的粉末进行放电等离子烧结而制成的。发现所有样品均发生脆性断裂。掺杂石墨烯的p型样品的解理微观结构为层状，晶粒具有明显的刻面。在n型材料中，晶粒失去了晶面，石墨烯含量增加。掺杂和未掺杂石墨烯的p型样品具有相同的极限强度，σ _u = 208 ± 10 MPa。掺杂石墨烯的n型样品的极限强度为σ _u = 222±10 MPa，普通样品的极限强度为σ _u  = 167 MPa。