This inventor holds 1 USPTO granted patent. Top assignee: Korea Advanced Institute of Science and Technology. Active years: 1986.
Company Filing History:
Years Active: 1986
Title: Long Choi: Innovator in Cutting Tool Materials
Introduction
Long Choi is a prominent inventor based in Seoul, South Korea. He has made significant contributions to the field of materials science, particularly in the development of advanced cutting tools. His innovative work has led to the creation of a unique sintered material that enhances the performance and longevity of cutting tools.
Latest Patents
Long Choi holds a patent for a sintered material of silicon nitride specifically designed for cutting tools. This material is prepared by sintering a mixture of silicon nitride containing 2-10 percent by weight of yttrium oxide, 1-5 percent by weight of aluminum oxide, and 10-40 percent by weight of titanium carbide coated with titanium nitride. The process involves hot pressing or sintering followed by hot isostatic pressing at elevated temperatures ranging from 1600°C to 1800°C. The coated titanium carbide is formed by depositing a film of titanium nitride on its surface in the presence of gaseous titanium tetrachloride, hydrogen, and nitrogen. This innovative material provides cutting tools with higher toughness, strength, and a longer lifespan.
Career Highlights
Long Choi is affiliated with the Korea Advanced Institute of Science and Technology, where he continues to advance research in materials for cutting tools. His work has garnered attention for its practical applications in various industries, enhancing the efficiency and durability of cutting tools used in manufacturing processes.
Collaborations
Throughout his career, Long Choi has collaborated with notable colleagues, including Kam-Yong Jang and June-Gunn Lee. These collaborations have contributed to the development of innovative materials and technologies in the field.
Conclusion
Long Choi's contributions to the field of cutting tool materials exemplify the impact of innovative research on industrial applications. His patented sintered material represents a significant advancement in the performance of cutting tools, showcasing the importance of continued innovation in materials science.