Data for: Polyetheretherketone, Hexagonal Boron Nitride, and Tungsten Carbide Cobalt Chromium Composite Coatings: Mechanical and Tribological Properties

Load vs. displacement (indentation depth) data for the PEEK/hBN/WC-CoCr composite coatings S40, S50, S65, D40, D50, and D60, the polished coatings PS40, PS50, and PS65, and the polished PEEK coating, are given in files named "NAME_LOAD_DISP.csv," where NAME (e.g., POLISHED_PEEK) denotes the coating tested. Each file contains several columns with pairs of depth and load values. The indentation depth values are in the units of nanometers and the load values are in micronewtons. Each load-depth pair corresponds to one indentation measurement on a given coating.The results of the analysis of each load-displacement curve using the Oliver-Pharr approach is summarized in files called "NAME_CALC_RESULTS.csv." Each row in this file corresponds to one nanoindentation measurements. See the section of the article titled "Nanoindentation" for the definitions of the variables, A, Ac, Er, H, hc, hf, hmax, m, Pmax, and S.<br>A, hf, and m are the parameters of an empirical model [Eq. 1)] obtained by fitting Eq. (1) to the unloading section of the load-displacement data. S is the stiffness, Er is the reduced modulus, and H is the hardness. hc is the contact depth and Ac is the area of contact. Pmax and hmax are the maximum indentation force and the maximum indentation depth, respectively. heff is the "effective" maximum depth from an indent. It corresponds to the maximum load value, Pmax, and is calculated using the fitted parameters of Eq. (1). It is the value of hmax used in Eq. (4) for calculating contact depth in Oliver-Pharr analysis.<br>The distributions shown in Fig. 9 are based on the reduced modulus values given in these files.The file "XRD_DATA.csv" contains the X-ray diffraction data shown in Fig. 4. The first column contains the diffraction angles (2theta in degrees), and the remaining columns contain the corresponding intensities of the diffracted X-ray beam. Data for the as-received PEEK, hexagonal boron nitride, and WC-CoCr powders, and the 4130 steel substrate, and the compression-molded coatings of PEEK and a PEEK/hBN/WC-CoCr composite coating are provided.<br>

本数据集提供了聚醚醚酮（PEEK）/六方氮化硼（hexagonal boron nitride, hBN）/WC-CoCr复合涂层S40、S50、S65、D40、D50、D60，抛光涂层PS40、PS50、PS65以及纯抛光PEEK涂层的载荷-位移（压入深度）数据，这类数据存储于名为"NAME_LOAD_DISP.csv"的文件中，其中NAME（例如POLISHED_PEEK）代表被测涂层的名称。每个文件包含多组深度与载荷值的列数据，其中压入深度单位为纳米（nm），载荷单位为微牛（μN），每一组载荷-深度数据对应一次对某一涂层的纳米压痕（Nanoindentation）测试。

采用Oliver-Pharr方法对每条载荷-位移曲线进行分析得到的结果，汇总于名为"NAME_CALC_RESULTS.csv"的文件中。该文件的每一行对应一次纳米压痕测试结果。变量A、Ac、Er、H、hc、hf、hmax、m、Pmax和S的定义，请参见本文献中题为"纳米压痕（Nanoindentation）"的章节。

其中A、hf和m是通过将式(1)拟合至载荷-位移曲线卸载段得到的经验模型参数[参见式(1)]；S为刚度（stiffness），Er为约化模量（reduced modulus），H为硬度（hardness），hc为接触深度，Ac为接触面积；Pmax与hmax分别代表最大压入载荷与最大压入深度。heff为压痕的"有效"最大深度，其对应最大载荷Pmax，通过式(1)的拟合参数计算得到，同时也是Oliver-Pharr分析中用于计算接触深度的式(4)所使用的hmax值。

图9所示的分布基于上述文件中记录的约化模量数值。

文件"XRD_DATA.csv"包含图4所示的X射线衍射（X-ray diffraction, XRD）数据。该文件第一列为衍射角（2θ，单位为度），其余各列为对应衍射X射线束的强度。数据涵盖原始态PEEK、六方氮化硼（hBN）、WC-CoCr粉末，4130钢基底，以及纯PEEK压制成型涂层与PEEK/hBN/WC-CoCr复合压制成型涂层的衍射数据。