The Coolidge Process

William D. Coolidge (1873-1975), Figure 8, began his career at GE's research laboratory in September 1905. Interestingly, Coolidge's first task was to investigate the cause of the rapid breakage of the filament of the German tantalum lamp when operating under alternating current, most likely due to the limitations of the lamp's cavity technology and the residual gas in the bulb.

In recent years, tungsten rings have been a popular choice for their durable and scratch-resistant properties. However, they can also lose their luster over time. Below, we will explain how to take care of your tungsten wedding ring.

From a historical perspective, William D. Coolidge's development PM process and tool "for making tungsten ductile" in 1909 marked the beginning of the use of tungsten filaments in the lighting industry. William D. Coolidge's development of the PM process and tools to "make tungsten ductile" in 1909 marked a breakthrough in the use of tungsten filaments in the lighting industry and began the modern industrial era of Powder Metallurgy.

Atomically thin layers of semiconductors, such as molybdenum disulfide (MoS₂) and tungsten disulfide (WS₂), are promising materials for nanoscale photonic devices. These nearly two-dimensional semiconductor support so-called excitons or bound electron-hole pairs, which can be aligned vertically along the thin planes of the material.