Accelerate the oxidation of tungsten, seriously shorten the life of the product, resulting in product failure

Tungsten halogen lamp with a key piece for the electrodes, tungsten and key pieces connected by spot welding, glass bulb filled with hydrogen, platinum plate and a glass full sealing at high temperatures to form tungsten halogen lamps. Tightness after sealing a direct impact on the life of the lamp. The quality of the products examined the strange, often found in air bubbles in the glass sealing surface Swiss platinum pieces, about 20% of total production. Gas tube leak caused the emergence of satiety, while accelerating the oxidation of tungsten, severely  copper molybdenum  of the product, resulting in product failure. In order to find out the reason for the gas saturation and gas saturation of the proposed measures to prevent, paper, failure analysis methods applied spectroscopy, scanning  Tungsten copper alloy  and transmission electron microscopy and other means to conduct research on a seal platinum chip sealing in high temperature and glass. The results showed that when aluminum and glass at high temperature sealing, are key causes of the bubble sheet internal inclusions and gases, the paper also presents how to prevent bubbles.