A Novel Temperature Adaptive Nano-crystalline Dry Lubricant plus Hard Phase Composite Coating for Cutting Tools and Advanced Machining Applications

该项目旨在设计、开发和测试一种新型的温度自适应和纳米晶干润滑剂（MoS2+ZnO）加硬相（TiN）复合涂层，用于切削工具和高级加工应用。纳米晶干燥润滑剂（MoS2+ZnO）颗粒涂层将采用创新的静电喷涂（ESC）工艺沉积。在这个项目中，纳米晶ZnO粒子，通过球磨工艺涂覆MoS2，将使用ESC喷涂到适当的基板上。随后，采用化学气相渗透（CVI）工艺将坚硬的TiN相渗透到纳米晶颗粒ZnO基体中。选择氧化锌+ MoS2的组合进行研究，因为它可以形成氧硫钼酸盐和钼酸盐，这两种化合物在高温应用中表现出良好的潜力。该项目是阿肯色大学材料与制造研究实验室（MRL）和valite - widia材料研究与开发（MRD）之间的合作项目。作为该项目的一部分，学生和大学教师将在瓦伦蒂进行部分研究。以这种方式获得的经验将对该项目大有裨益，并将培养一批在纳米技术和先进制造等新兴领域知识渊博的优秀员工。该计划将真正为最先进的科学和工程创新添加，因此，将使研究人员能够有竞争力地解决数十亿美元的切削工具行业对低成本，温度自适应润滑的新需求，即使是在复杂的表面上。这项技术的建立和由此产生的产品可以成为实现干式加工的重要一步，以实现具有环保意识的“绿色”制造。

This project is to design, develop and test a novel temperature adaptive and nano-crystalline dry lubricant (MoS2+ZnO) plus hard phase (TiN) composite coating for cutting tools and advanced machining applications. The nano-crystalline dry lubricant (MoS2+ZnO) particulate coating will be deposited using an innovative electrostatic spray coating (ESC) process. In this project, nano-crystalline ZnO particles, coated with MoS2 via a ball milling process, will be sprayed onto appropriate substrates using ESC. Sequentially, a hard TiN phase will be infiltrated into the nano-crystalline particulate ZnO matrix using a chemical vapor infiltration (CVI) process. The combination of ZnO + MoS2 was selected for investigation because it forms oxythiomolybdates and molybdates, which have exhibited an excellent potential for high temperature applications.The project is a collaboration between the Materials and Manufacturing Research Laboratories (MRL) at the University of Arkansas and Materials Research and Development (MRD) at Valenite-Widia. As a part of the project, students and university faculty will perform part of the research at Valenite. The experience gained in this manner will be of great benefit to the project and will generate an outstanding workforce knowledgeable in the emerging area of nano-technology and advanced manufacturing. This program will truly add scientific and engineering innovations to the state-of-the-art, and thus, will allow the investigators to competitively address the emerging needs of the multi-billion dollar cutting tool industry for low cost, temperature adaptive lubrication, even on complex surfaces. The establishment of this technology and resulting products can be a major step in the realization of dry machining for environmentally conscious "green" manufacturing.