Matrix Research Inc. has awarded a $45 million contract to boost stealth technology for the U.S. Air Force. The Beavercreek company is being asked to develop ways to reduce the production and sustainment burden of stealth treatments, materials, repairs, and processes. That’s because stealth aircraft are expensive to build and costly to maintain. Air Force Research Laboratory, which is headquartered at Wright-Patterson Air Force Base, issued the six-year contract. Matrix Research is a small,…