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Materials

Topologically optimized designs for a thermally conductive mechanical bracket. Priority for thermal performance (left), both thermal and mechanical performance (center), and mechanical performance (right).

To fully leverage the design freedom of additive manufacturing, Sandia has and continues to develop tools for directly computing the design of components and systems that optimize relevant performance objectives (for example, thermal, mechanical, and electrical) while meeting essential requirements (such as volume and mass). These optimization-based design tools allow engineers to explore more freeform or “organic” topologies with only performance goals dictating the final design. This new capability is built on Sandia’s extensive computational investments (in Trilinos, Sierra, and Albany, for example) and leverages high-performance computing resources. (1400, 1500), NW, NW

Nano-ionic resistive memory devices or “memristors” are needed to enable neuromorphic computing with a significant reduction in power consumption. Using ion-aassisted deposition (IAD), Ron Goeke and Carl Smith (1832) have developed a method to make memristor devices reliably. The IAD deposition approach involves e-beam evaporation of tantalum metal with a reactive beam of argon and oxygen ions impinging on the growing film. Using this technique, the oxide formation occurs at the substrate, resulting in better control over film stoichiometry and yielding low variability.  (1800), DSA, SDP