Book excerpt: Since the 1920s, modern powder metallurgy has been used to produce a wide range of structural powder metallurgy components, self-lubricating bearings, and cutting tools. The conventional method involves the production of metal powders and the manufacture of useful objects from such powders by die compaction and sintering. Powder injection molding permits the production of stronger, more uniform, and more complex powder metallurgy parts. A detailed discussion of powder metallurgy materials and products is given in this book. Worked examples, exercises, questions, and problems are included in each chapter.