"In the 1960s, a Chinese fisherman was fishing in the sea and couldn't pull up his net. It turned out that he had netted an advanced foreign aircraft. The plane landed off the coast of China at some point. The aluminum alloy was corroded, there was not much stainless steel left, but there was one piece of metal that was intact, that was bright, that was corroded so well -- titanium alloy." Cao Chunxiao, the 87-year-old founder of titanium alloy research and an academician of the Chinese Academy of Sciences, tells the story like a family treasure. Not long ago, he introduced the little-known history of China's titanium alloy development in his lecture on Science and Innovation China.
Cao started researching titanium alloys 65 years ago as soon as he graduated from Shanghai Jiao Tong University. Titanium alloy was a new material invented in the United States at the time to make aircraft engines and propeller hubs.
"Titanium alloy is not only resistant to corrosion, its average density is around 4.5×103kg, which is much lighter than 7.85×103kg steel, but its strength is similar to that of steel." Cao said titanium makes the aircraft fly faster and more flexibly.
Next, Cao Chunxiao developed titanium alloys containing neodymium, a rare earth element, which are more heat resistant and stronger. China's military titanium alloy level is catching up.
At the same time, The use of titanium alloy in China's civil field has also surged, becoming a big country of titanium alloy.
"Titanium alloy corrosion resistance, it with the human body will not affect each other to cause allergies, so people's shoulder joint is bad, bad skull, can use titanium alloy to replace; "Implants are made of titanium alloy, which is fastened to the gums, and then you have porcelain teeth on top so you can eat anything." 'Titanium can also be used as a tennis racket, a thermos cup, a frying pan...
Cao's dentures and pacemakers also contain titanium alloy. "What I do improves the quality of my life," he laughs.
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