Bimetallic low thermal-expansion panels of Co-base and silicide-coated Nb-base alloys for high-temperature structural applications

Designing Mechanical Metamaterials with Kirigami‐Inspired, Hierarchical Constructions for Giant Positive and Negative Thermal Expansion

“…Most natural materials expand isotropically upon heating because the kinetic energy of molecules increases their range of motion in non‐parabolic atomic potentials, thereby offering positive thermal expansion coefficients (CTEs), most of which are in the range from ≈1 to 300 ppm K −1 . Recent studies demonstrate that mechanical metamaterials with optimized microstructure architectures can yield unconventional thermal expansion behaviors, such as near‐zero thermal expansion, [ 1–5 ] negative thermal expansion, [ 6–11 ] and thermally induced shear. [ 12 ] These mechanical metamaterials are of increasing interest, because of their potential for use in applications such as high‐precision space optical systems, [ 13,14 ] adaptive connecting components in satellites, [ 15,16 ] flexible MEMS that require excellent thermal stability, [ 17–24 ] battery electrodes with unique thermal expansion, [ 25–29 ] dental fillings, [ 30 ] thermally controlled shape‐changing structures, [ 12,31–48 ] etc.…”

Development of designing lightweight composites and structures for tailorable thermal expansion

“…Rhein等人 [64] 采用铌与钴合金制备了平面点阵 复 合 材 料 , 如 图 9(d )和 (e)所 示 , 并 测 试 了 室 温 至 1000℃以内的热变形, 发现其设计和制备的平面点 阵复合材料可以分别实现6.0和1.0 ppm/℃热膨胀系 数. Yamamoto等人 [65] 采用微细加工技术制备了图 9(c)所示的微型点阵复合材料. 该点阵复合材料胞元 仅 有 数 十 微 米 , 因 此 具 有 该 细 观 结 构 的 材 料 在 宏 54 图 9 (网络版彩色)Steeves (a) [62] , Gdoutos (b) [63] , Yamamoto (c) [65] 采用钛 与铝合金以及Rhein (d), (e) [64] 采用铌与钴合金制备的平面点阵复合材料 Figure 9 (Color online) The fabricated planar lattice composites by Steeves (a) [62] ; Gdoutos (b) [63] , Yamamoto (c) [65] through titanium and aluminum alloys and by Rhein (d), (e) [64] through niobium and cobalt alloys 观上具备连续材料的特征, 并能够实现特定设计的 热膨胀系数. Berger等人 [66] 图 10 (网络版彩色)制备的平面点阵复合材料 [61] .…”

Revolutionary Materials for Hypersonic Flight

“…Modifications of the original lattice designs to enable larger skewness angles (and hence access a broader range of thermal expansion coefficients) along with higher stiffness and narrower gaps between the members have been implemented and analyzed ( Figure 8). Concepts for lattices with high temperature capabilities have also been devised [12]. In one case, the low CTE constituent consisted of a continuous network of the Nb-base alloy C-103 with inserts of high CTE Co-base alloy Haynes 188 ( Figure 9).…”