China has invented a carbon aircraft brake disk, breaking foreign companies' monopoly on the product.

The brake disk, developed by the Xi'an Chaoma Technology Co. Ltd affiliated with the China Aerospace Science and Technology Corporation, passed experts' appraisal here Friday.

The brake disk has proprietary intellectual property rights and its function has reached international level, according to the appraisal meeting.

The disk costs half of the similar products overseas and can save about 100 million yuan (US$14.6 million) a year for the Chinese civil aviation industry.

The disk applies the carbon-carbon composite materials, which has high intensity and stiffness. It's 40 percent lighter than the trational metal materials and can resist temperature as high as 2,000 degrees Celsius.

The disk has got the manufacturing licence for the Boing 757 and Airbus 318/319/320.

(Xinhua News Agency December 6, 2009)