AI-Guided Self-Driving Laboratories for Advanced Materials Discovery
Discovering new high-performance materials and alloys is often likened to finding a needle in a haystack because the design space of chemical compositions and processing conditions is astronomically large, and the discovery process is laborious and prohibitively costly. This perspective articulates a research agenda for autonomous materials and metallurgy discovery platforms that combine closed-loop machine learning with robotic experimentation and traditional materials engineering precepts to formulate, process, and test candidate materials with reduced human intervention, and to iterate recursively for stepwise optimization. It explores how sequential learning methods, generative modeling, and hybrid model-based strategies can analyze multimodal experimental data and propose new compositions and processing schedules for subsequent experiments. This approach has the potential to considerably accelerate the pace of discoveries, from decades to mere weeks. Representation learning for material formulations, the injection of domain knowledge into decision-making, and the mechatronic design of robotics that can safely execute harsh processing are all explored as essential components in closing the autonomous loop. Surveyed exemplars show order-of-magnitude improvements in experimental throughput and discovery efficiency. Furthermore, the paper proposes a multidimensional framework for classifying and evaluating the autonomy, complexity, and integration levels of self-driving laboratories, intended to give researchers and practitioners a structured approach to benchmarking future developments in the field. The perspective concludes with an analysis of data infrastructure, simulation coupling, robustness, and human-machine collaboration, distilled into a structured research agenda whose pursuit would broaden adoption across energy, aerospace, and other sectors.